Recipe From Another Time

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The Yale Babylonian Collection houses four unique tablets that contain various recipes for stews, soups and pies. Three of these tablets date back to the Old Babylonian period, no later than 1730 B.C. Klaus Wagensonner/Yale Babylonian Collection

A meal from ancient history, decoded, and the scholar who sleuthed the recipe discusses it in a brief interview:

Eat Like The Ancient Babylonians: Researchers Cook Up Nearly 4,000-Year-Old Recipes

What did a meal taste like nearly 4,000 years ago in ancient Babylonia? Pretty good, according to a team of international scholars who have deciphered and are re-creating what are considered to be the world’s oldest-known culinary recipes.

The recipes were inscribed on ancient Babylonian tablets that researchers have known about since early in the 20th century but that were not properly translated until the end of the century.

The tablets are part of the Yale Babylonian Collection at the Yale Peabody Museum. Three of the tablets date back to the Old Babylonian period, no later than 1730 B.C., according to Harvard University Assyriologist and cuneiform scholar Gojko Barjamovic, who put together the interdisciplinary team that is reviving these ancient recipes in the kitchen. A fourth tablet was produced about 1,000 years later. All four tablets are from the Mesopotamian region, in what is today Turkey, Syria, Iran and Iraq. Continue reading

Crowd-Sourced Data from the Deep

Female sand tiger shark observed on the wreck Aeolus in (a) September 2016 and (b) 10 months later in July 2017. In the older photograph (a), fishing gear is visible in the mouth of the shark (inset). SPOT A SHARK USA BY TANYA HOUPPERMANS.

A great example of how data crowd-sourced from Citizen Scientists is helping to improve understanding of shark populations and behavior.

Female Sand Tiger Sharks Love Shipwrecks… Really.

Site fidelity – the tendency to return to a particular area – isn’t exactly new in a species of shark (e.g. reef sharkslemon sharks, even great white sharks). But that place is usually some sort of habitat… not a over 100-feet (34 meter) deep shipwreck. However, that is exactly the case for female sand tiger sharks (Carcharias taurus) off the coast of North Carolina!

Sand tiger sharks, also known as grey nurse sharks or spotted ragged-tooth sharks, are found globally in subtropical and temperate waters. Despite looking quite scary due to their tooth grins that never quite close, they are a slow-moving shark that are listed as Vulnerable by the International Union for Conservation of Nature (IUCN). A grey colored shark with reddish-brown spots throughout its body, they feast on a variety of animals such as a fish, crustaceans, squid, skates and even other sharks!

In September 2016, a citizen scientist wasn’t surprised to see an individual female sand tiger shark while scuba diving on the Aeolus shipwreck. Continue reading

Putting the Reuse back into Recycle

Thanks once again to YaleEnvironment360 for sharing valuable information.

Scientists Find Way to Fully Recycle Plastics Without Losing Quality

A team of Swedish scientists have found a new way to break down plastic so that it can be recycled into material the same quality as the original — a process they say could help shift the focus of the plastics industry to recycling and drastically reduce the amount of pollution that ends up in the world’s oceans.

The technique involves heating discarded plastic to around 850 degrees Celsius until it turns into a gas mixture. That mixture “can then be recycled at the molecular level to become new plastic material of virgin quality,” Henrik Thunman, an environmental scientist at Chalmers University of Technology who led the new research, said in a statement. “Circular use would help give used plastics a true value, and thus an economic impetus for collecting it anywhere on earth.” Continue reading

Unsubtle Love Song

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Female bellbirds lack a wattle and sing no songs. Anselmo d’Affonseca

Cara Giaimo provides additional perspective, perhaps the key question in the New York Times coverage of this story, which is about the female in this species, along with a great recording of the male’s call:

…One big mystery remains. The white bellbird sings its pile driver tune when a potential mate is nearby. It starts facing away from her, and then whips around to blast the loudest, record-setting note right into her face. Continue reading

Proforestation & The Value Of Mature Forests

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Thanks to Yale e360 for this interview that helps us understand the dynamics and differences between mature forests and newly planted forests in terms of carbon sequestration:

Why Keeping Mature Forests Intact Is Key to the Climate Fight

Preserving mature forests can play a vital role in removing CO2 from the atmosphere, says policy scientist William Moomaw. In an e360 interview, he talks about the importance of existing forests and why the push to cut them for fuel to generate electricity is misguided.

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A mature forest in the Berkshire Hills in western Massachusetts. LIZA DALY/FLICKR

William Moomaw has had a distinguished career as a physical chemist and environmental scientist, helping found the Center for International Environment and Resource Policy at Tufts University’s Fletcher School and serving as lead author on five reports of the Intergovernmental Panel on Climate Change (IPCC). In recent years, Moomaw has turned his attention to working on natural solutions to climate change and has become a leading proponent of what he calls “proforestation” — leaving older and middle-aged forests intact because of their superior carbon-sequestration abilities.

While Moomaw lauds intensifying efforts to plant billions of young trees, he says that preserving existing mature forests will have an even more profound effect on slowing global warming in the coming decades, since immature trees sequester far less CO2 than older ones. In an interview with Yale Environment 360, Moomaw explains the benefits of proforestation, discusses the policy changes that would lead to the preservation of existing forests, and sharply criticizes the recent trend of converting forests in the Southeastern U.S. to wood pellets that can be burned to produce electricity in Europe and elsewhere.

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An area of clearcut forest in the Tar-Pamlico River basin in northeastern North Carolina. DOGWOOD ALLIANCE

“The most effective thing that we can do is to allow trees that are already planted, that are already growing, to continue growing to reach their full ecological potential, to store carbon, and develop a forest that has its full complement of environmental services,” said Moomaw. “Cutting trees to burn them is not a way to get there.”

Yale Environment 360: How do you define proforestation?

William Moomaw: So I began looking at some of the data and some of the papers that had come out recently, and I found that if we managed our forests and grasslands in a different way they could be sequestering twice as much carbon dioxide from the atmosphere as they currently do. Continue reading

Drones Sound Like Bees To Wild Animals

Our links to stories in Cool Green Science have been among the most abundant of all our sources. This may be due to the publication’s commitment to finding stories that highlight positive change in our approach to understanding, respecting, protecting the environment. Here is another:

Gustavo Lozada wants to change your mind about using drones around wildlife.

Lozada, technology manager for The Nature Conservancy in Colorado, knows that many people think that increasing drone use will only harass and terrify wild animals. He also knows it doesn’t have to be that way, and that drones can be a really important tool in wildlife research and protection. The videos in this blog, he hopes, will show that drones do not have to disturb the peace.

To be clear, Lozada knows that much drone use is detrimental to wildlife. He points to a recent viral video that showed a small cub trying repeatedly to scale slick, snowy slopes to reach its obviously distressed mother. The video was widely shared as showing the cub’s pluck and determination.

But researchers and animal lovers questioned that narrative, as reported in a National Geographic story titled “Viral bear video shows dark side of filming animals with drones.” The article notes that the whole reason the cub found itself in its predicament was likely because it was terrified of the drone filming it. Continue reading

Barn Owls Throw Shade

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Arterra/Universal Images Group, via Getty Images

Thank you, as always, Mr. Gorman:

White Barn Owls Thrive When Hunting in Bright Moonlight

Something about the light from a full moon shining on the frightening face of a barn owl makes voles freeze a bit too long.

When the moon hits your eye like a big pizza pie, it may not be amore at all, but a ghostly white barn owl about to kill and eat you.

If you’re a vole, that is.

Voles are a favorite meal for barn owls, which come in two shades, reddish brown and white. When the moon is new, both have equal success hunting for their young, snagging about five voles in a night. But when the moon is full and bright, the reddish owls do poorly, dropping to three a night.

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Education Images/Universal Images Group, via Getty Images

Barn owls with white faces and breasts do as well as ever, however, even though they should be more easily spotted than their reddish relatives when the lunar light reflects off their feathers. Continue reading

Trees Breathe in Brooklyn

Using new technology, researchers can watch as trees grow, shrink, drink, and breathe. Illustration by Christelle Enault

When we start reading about using transducers to create precision dendrometers to see how a tree grows in Brooklyn, we know we are out of our league. But surprisingly readable, this story tells why it is important to be able to measure tree growth in real time:

A Day in the Life of a Tree

One morning earlier this summer, the sun rose over Brooklyn’s Prospect Park Lake. It was 5:28 a.m., and a black-crowned night heron hunched into its pale-gray wings. Three minutes later, the trunk of a nearby London plane tree expanded, growing in circumference by five-eighths of a millimetre. Not long afterward, a fish splashed in the lake, and the tree shrunk by a quarter of a millimetre. Two bullfrogs erupted in baritone harmony; the tree expanded. The Earth turned imperceptibly, the sky took on a violet hue, and a soft rain fell. Then the rain stopped, and the sun emerged to touch the uppermost canopy of the tree. Its trunk contracted by a millimetre. Then it rested, neither expanding or contracting, content, it seemed, to be an amphitheater for the birds.

“I wonder about the trees,” Robert Frost wrote. Monumental in size, alive but inert, they inhabit a different temporality than ours. Some species’ life spans can be measured in human generations. We wake to find that a tree’s leaves have turned, or register, come spring, its sturdier trunk. But such changes are always perceived after the fact. We’ll never see them unfold, with our own eyes, in human time.

To understand how trees transform, dendrochronologists, researchers who study change in trees, have developed a few techniques. They cut trees down to analyze their rings, which have been created by the seasonal formation of new cells, but this terminal strategy can provide only a static overview of the past. They “core” living trees, using bores to extract trunk tissue; this technique, however, can stress trees and sometimes, though rarely, wound them fatally. They measure tree girth with calipers and tape—a less invasive means of studying growth that is also frustratingly intermittent.

Once we had read to this point the following paragraph led to an image search. What does this thing look like? The story did not show it, only described it, so our image search led here:

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Figure M1 Collection of point dendrometers (natkon.ch). The carbon frames are either T-shaped (for large stems) or O-shaped (for small stems or branches) and are anchored in the stem with stainless steel rods. Up to three sensors are attached to the different type of frames in order to measure different expositions at the stem or to measure stem radius fluctuations over bark and on the xylem separately.

And those images helped the following make a bit more sense:

In the early two-thousands, a new technique emerged that changed the field. It relies on low-cost transducers: equipped with a tiny spring, a transducer—which converts, or “transduces,” physical motion into an electrical signal—can rest on the bark of a tree, sensing and logging tiny changes in pressure. Instruments that use this approach, known as precision dendrometers, allow scientists to do something entirely new: watch how trees change and respond to their environments on an instantaneous scale.

This spring, I walked along the eastern edge of Prospect Park Lake with Jeremy Hise, the founder of Hise Scientific Instrumentation, a company that sells affordable precision dendrometers to scientists, students, and members of what Hise called the “D.I.Y. makerspace.” Bearded and affable in jeans and a blue sweatshirt, Hise explained that his dendrometers could now deliver their measurements wirelessly to a cloud-based platform called the EcoSensor Network. Users of the network can monitor a tree’s growth, generate graphs, and correlate them with meteorological data. Together with Kevin Griffin, a professor of earth and environmental sciences at Columbia University, Hise is planning to build the largest network of dendrometers in the world, generating millions of data points each year. “We’re looking to be the Weather Underground of trees,” Hise said.

Continue reading

Perennial Grain’s Future

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Harvesting heads of Kernza, a newly developed perennial grain, on a research plot in Salina, Kansas. THE LAND INSTITUTE

Thanks to Jim Robbins, as always, and Yale e360 for brightening our day just a bit:

With New Perennial Grain, a Step Forward for Eco-Friendly Agriculture

A cereal and beers are now being made with a new variety of perennial grain known as Kernza. Proponents say this marks a significant advance for a new agriculture that borrows from the wild prairie and could help ensure sustainable food production in a warming world.

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A tractor plows a field of wheat stubble on a traditional farm near Pullman, Washington. RICK DALTON/ALAMY

Some 40 years ago, Wes Jackson, a plant geneticist, founded The Land Institute on the prairie near Salina, Kansas. Concerned that modern agriculture destroyed native grasslands, he asked a question that came to define his life: How can we harness the inherent strengths of the prairie ecosystem — the natural resistance of native plants to insects and weeds, the ability of those plants to grow perennially, and their evolved resistance to cold and drought — and marry those traits to the task of growing domesticated crops for food?

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Kernza’s long roots stabilize soil and prevent erosion. THE LAND INSTITUTE

Jackson, the recipient of a 1992 MacArthur “genius grant,” set out to create a new kind of farming he called “natural systems agriculture,” which has the “ecological stability of the prairie and a grain and seed yield comparable to that from annual crops.”

After four decades of breeding and testing, the institute has introduced its first commercial grain, a trademarked variety called Kernza, a domesticated wild grass — intermediate wheatgrass — that has a long, slender head that resembles wheat seeds. Described as sweet and nutty, it is now being made into a cereal called Honey Toasted Kernza by Cascadian Farms, and Patagonia Provisions — an offshoot of the clothing company — has brewed it into beers, including Long Root Pale Ale. Both are being produced now in limited runs.

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The perennial grain is currently being used to make small batches of cereal and beer. THE LAND INSTITUTE

The development of Kernza is being held out as a prime example of a new way of doing agriculture that borrows from the perennial nature of the wild prairie. “The goal is to mitigate a lot of the problems inherent in annual grain farming systems,” said Tim Crews, research director at The Land Institute. For example, he noted, “Farmers write off 50 percent of their fertilizer as not being taken up by the crop.” Continue reading

Our Favorite Form Of Prospecting

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Expedition members sprint to flush Slender-billed Flufftails, among the world’s most elusive birds, in a marsh in Bemanevika reserve. Photo: Tristan Spinski

Bioprospecting, a topic we have not posted enough about, came to our attention in the mid-1990s through Costa Rica’s National Institute of Biodiversity. Kimon de Greef, writing for Audubon Magazine, offers an inside view of a prospecting expedition in one of the most wondrous, and at-risk natural habitats on the planet:

Scientists Race to Uncover the Secrets of Madagascar’s Treasure-Filled Forests

The rediscovery of a long-lost duck spurred the creation of two protected areas in the country. Now researchers are scouring these spots for other endemic species before it’s too late.

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With only a few kilometers to go during day-long to Bemanevika, challenging road conditions forced the group to disembark from the two Toyota Land Cruisers and push them through the deep mud. Much of the terrain required the forest technicians to utilize the wench, which they fastened to tree stumps to wind the vehicles up the muddy mountain roads. Photo: Tristan Spinski

We had come this far and now we were stuck, dug in on a dirt track high above the plains. It was monsoon season in Madagascar, and thunderstorms had laid waste to the deeply rutted road. Already we had traversed seemingly unnavigable passes on our way to the remote northern mountains, mud churned to slurry by each passing set of wheels. Almost 24 hours later, this slope flanked by agave plants had defeated us. Our drivers took up shovels: There were ruts to flatten, boulders to excavate and heave into the bushes. As the workers toiled, cicadas hissed from the treetops.

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Map: Mike Reagan

For the field biologists I was accompanying, this breakdown of rural infrastructure held great promise. They were on their way to survey some of the island’s last remaining virgin rainforests—shrinking havens of exceptional biodiversity, including some of Earth’s rarest birdlife. “There’s definitely a correlation with how hard it is to get in,” said John Mittermeier, an expedition leader, ornithologist, and geography Ph.D. student at Oxford University, “and how likely you are to find new stuff.”

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Clockwise from top left: Spearpoint leaf-tail gecko; Andreone’s tree frog; Compsophis fatsibe snake; Boophis goudot frog; Calumma nasutum chameleon; Spinomantis nussbaumi frog. Photos: Tristan Spinski

Now a cry went up among the team. A snake was moving its way through the undergrowth, and with abandon they leapt after it. Luke Kemp, the herpetologist on the expedition, crouched beside the bushes, poking around but coming up empty. “It’s like an addiction,” he told me. “I can’t stop.”

The biologists had congregated from four countries, united by a relentless, even maniacal fascination with wildlife. They wore faded shirts from scientific conferences and were never without their binoculars. Instead of making small talk, they discussed bird calls and sampling methods, animated by purpose and shared expertise. In unison, like meerkats, Mittermeier and the other two birders swung their binoculars from side to side, trying to glimpse what sounded to them like an endemic robin. The two entomologists swept the air with butterfly nets; they would not hesitate, when their hands were full, to pop wriggling insect specimens between their lips. Continue reading

“Impossible Milk” – Yet Another Animal Husbandry Alternative

Bay Area-based company Perfect Day Foods developed a vegan, lactose-free ice cream containing milk proteins made by microbes rather than cows. Credit Perfect Day Foods

We’ve been writing about “fishless fish” and its beef counterpart quite a bit lately, and for good reason. The environmental impact of animal based agriculture is staggering; even grass-fed cattle raised well outside of industrial feedlots are responsible for carbon emissions.

Entrepreneurs and scientists are becoming great collaborators to develop tasty alternatives that can be healthy for the planet and humans.

Got Impossible Milk? The Quest for Lab-Made Dairy

With advances in synthetic biology, researchers and entrepreneurs strive to create cows’ milk without cows.

In recent years, the alternatives to conventional cows’ milk have proliferated. The local grocery store is likely to offer any number of plant-based options: milks made from soy, almonds, oats, rice, hemp, coconuts, cashews, pea plants and more.

But most nondairy milks pale in comparison to cows’ milk. Plant-based milks are made by breaking down plants and reconstituting their proteins in water to resemble the fluid from a lactating bovine. These proteins differ fundamentally from true dairy proteins, and the results — milks, cheeses and yogurts in name only — often fail to measure up in color, taste or texture. Inja Radman, a molecular biologist and a founder of New Culture, a food company, put it plainly.

“Vegan cheese is just terrible,” she said. “As scientists, we know why it doesn’t work. It doesn’t have the crucial dairy proteins.”

Dairy tastes like dairy thanks to two key proteins, casein and whey protein. Researchers at several start-up companies, including New Culture, have begun producing these proteins in the lab, with the aim of creating a new grocery store category: cow-free dairy.

Continue reading

Penitentes, An Otherworldly Wonder

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Lara Vimercati and Jack Darcy, two graduate students, at the edge of a penitente field on a Chilean volcano where researchers unexpectedly found algae. Steven K. Schmidt

Thanks to JoAnna Klein for bringing this question, and another Chilean wonder, to our attention:

If Algae Clings to Snow on This Volcano, Can It Grow on Other Desolate Worlds?

Scientists were surprised to find something living on the sterile heights of this Chilean volcano.

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The penitentes are thought to result from an unusual mix of wind, temperature fluctuations and the sun’s ultraviolet rays. Steve Schmidt

In Chile’s Atacama Desert, Volcan Llullaillaco is Mars on Earth — or about as close to it as you can get. At 22,000 feet above sea level, it’s the second highest active volcano on Earth. Most of the mountain is a barren, red landscape of volcanic rock and dust, with thin, dry air, intense sunlight and winds that will blow your tent down the mountain.

While the ground can heat up to 90 degrees Fahrenheit, air temperatures rarely reach above freezing. When snow falls, it turns to gas just as it hits the earth. Occasionally, snow can collect in windblown banks, which then melt into icy spires up to 16 feet tall. The Spaniards called these “nieves penitentes,” penitent ones, because they look like hooded monks doing penance.

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Steve Schmidt

These conditions high up on the volcano made it seem about as lifeless as Mars. But a team of researchers led by Steven K. Schmidt, a microbiologist at the University of Colorado Boulder who studies extreme life, have discovered microbes living in and around the penitentes at 17,300 feet above sea level, about one thousand feet above the point at which vegetation stops on Volcan Llullaillaco. Continue reading

The Corn Of The Future Is Valuable Patrimony From Mexico

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A Mexican scientist inspects a field of olotón maize near Oaxaca, Mexico. ALLEN VAN DEYNZE/UC DAVIS

Thanks to Martha Pskowski and Yale e360 for this:

Indigenous Maize: Who Owns the Rights to Mexico’s ‘Wonder’ Plant?

A nitrogen-fixing maize grown in an indigenous region of Mexico has the ability to fertilize itself, recent research shows. Now, as a global company and U.S. scientists work to replicate this trait in other corn varieties, will the villages where the maize originated share fairly in the profits?

In a 1979 visit to Totontepec, a small town in Oaxaca, Mexico, naturalist Thomas Boone Hallberg marveled at the local maize. The plants grew nearly 20 feet high in nutrient-poor soil, even though local farmers did not apply any fertilizer.

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MARS, INCORPORATED & JEAN-MICHEL ANE/UC DAVIS

The maize had aerial roots that grew a mucous-like gel just before harvest season. It seemed impossible, but Hallberg wondered if the maize was fixing its own nitrogen: extracting it from the air and somehow making it usable for the plant. He had visited countless towns since moving to Oaxaca in the 1950s, but what he saw in Totontepec stuck with him.

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The maize variety olotón has aerial roots that produce a mucous-like gel that fixes nitrogen, meaning that it can effectively fertilize itself. MARS, INCORPORATED & JEAN-MICHEL ANE/UC DAVIS

In 1992, Hallberg returned with a group of Mexican scientists. The maize, known as olotón, was almost ready for harvest and its aerial roots glistened with gel. Ronald Ferrera-Cerrato, a microbiologist, took samples back to his lab outside Mexico City to test the bacteria in the gel. His preliminary results, published in a 1996 report, showed that the maize received nitrogen from the air, through its aerial roots, meaning that it effectively had the ability to fertilize itself.

At the time, scientists around the world were puzzling over similar questions. In a 1996 paper in Plant and Soil, microbiologist Eric Triplett, then at the University of Wisconsin, described the possibility of corn plants that fix nitrogen as “the ‘holy grail’ of nitrogen fixation research” because of the potential to reduce fertilizer demand. Continue reading

Could “Fishless Fish” Play a Part Helping Oceans Recuperate?

This salmon, by Wild Type, was grown from cells in a lab. The company is one of several developing seafood alternatives. Kelsey McClellan for The New York Times

First, there was the meatless burger. Soon we may have fishless fish.

Impossible Foods, the California company behind the meatless Impossible Whopper now available at Burger King, is joining a crowded field of food companies developing alternatives to traditional seafood with plant-based recipes or laboratory techniques that allow scientists to grow fish from cells.

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Good Catch Tuna, made from plants, is available at Whole Foods. Kelsey McClellan for The New York Times

So far, much of Impossible’s work has focused on the biochemistry of fish flavor, which can be reproduced using heme, the same protein undergirding its meat formula, according to Pat Brown, the company’s chief executive. Last month, Impossible’s 124-person research and development team, which the company plans to increase to around 200 by the end of next year, produced an anchovy-flavored broth made from plants, he said.

“It was being used to make paella,” Mr. Brown said. “But you could use it to make Caesar dressing or something like that.”

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Wild Type held a tasting of its lab-grown salmon last month in Portland, Ore. Kelsey McClellan for The New York Times

The fishless-fish project is part of Impossible’s grand ambitions to devise tasty replacements for every animal-based food on the market by 2035. Whether that aim is achievable, either scientifically or financially, remains to be seen. But for now, Mr. Brown said, he’s confident Impossible’s plant-based beef recipe can be reconfigured to simulate a new source of protein.

It’s unclear whether consumers — even those who eat meatless burgers — will embrace fish alternatives.

Those faux-beef products owe their success partly to the enthusiasm of so-called flexitarians, people who want to reduce their meat consumption without fully converting to vegetarianism, but flexitarians are not necessarily motivated by a desire to save the planet. Indeed, industry experts say, many of them are drawn to plant-based meat more for its perceived health benefits than for its role in reducing the food industry’s reliance on production techniques that release greenhouse gases. Continue reading

Tropical Wetlands Offer Another Surprise

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A wetland forest in Tupana, Brazil. AMAURI AGUIAR/FLICKR

Tropical wetlands have been a source of wonder, due to their biodiversity, since we started paying attention along time ago. Fred Pearce offers another of his surprises here:

Scientists Zero in on Trees as a Surprisingly Large Source of Methane

Recent research is showing that trees, especially in tropical wetlands, are a major source of the second most important greenhouse gas in the atmosphere, methane. The knowledge that certain woodlands are high methane emitters should help guide reforestation projects in many parts of the world.

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Tropical wetlands, such as this mangrove forest in Bali, give off the most intense tree-based emissions of methane. ALAMY

There are many mysteries in the Amazon. Until recently, one of the most troubling was the vast methane emissions emerging from the rainforest that were observed by satellites but that nobody could find on the ground. Around 20 million tons was simply unaccounted for.

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Sunitha Pangala installs a device that measures a tree’s methane emissions, in the Amazon. COURTESY OF SUNITHA PANGALA

Then Sunitha Pangala, a British post-doc researcher, spent two months traveling the Amazon’s waterways strapping gas-measuring equipment to thousands of trees. She found that trees, especially in the extensive flooded forests, were stimulating methane production in the waterlogged soils and mainlining it into the atmosphere.

Her 2014 expedition plugged a gaping hole in the planet’s methane budget. And she had discovered a hitherto ignored major source of the second most important greenhouse gas in the atmosphere. It now seems that most of the world’s estimated 3 trillion trees emit methane at least some of the time. Continue reading

Animal Migration In A New Light

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Craig K. Lorenz

It’s been a while, Carl Zimmer! Welcome back to our pages and thanks for this new consideration of what is included in the definition of animal migration, a pair of words normally associated with big mammals and birds:

These Animal Migrations Are Huge — and Invisible

Swarms of insects move across continents each year. Scientists used radar to track one species and discovered a vast ecological force.

Ladybugs briefly took over the news cycle.

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In this radar image, green indicates a swarm of ladybugs over Southern California. National Weather Service, via Associated Press

Meteorologists at the National Weather Service were looking over radar images in California on the night of June 4 when they spotted what looked like a wide swath of rain. But there were no clouds.

The meteorologists contacted an amateur weather-spotter directly under the mysterious disturbance. He wasn’t getting soaked by rain. Instead, he saw ladybugs. Everywhere.

Radar apparently had picked up a cloud of migrating ladybugs spread across 80 miles, with a dense core ten miles wide floating 5,000 feet to 9,000 feet in the air. As giant as the swarm was, the meteorologists lost track of it. The ladybugs disappeared into the night. Continue reading

Collective Action’s Pre-historic Remains

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Nobuaki Mizumoto first saw this fossil at the dinosaur museum in his hometown. MIZUMOTO / PROCEEDINGS OF THE ROYAL SOCIETY B

Collective action, mentioned in the title of a 2011 post on this platform and many times since, is a concept puzzling enough in the here and now. Or in the case of my doctoral dissertation, the recent past.

An Incredible Fossil Contains a Whole School of 259 Fish

How did they all die at once?

In 2016, Nobuaki Mizumoto was visiting the dinosaur museum in his hometown of Katsuyama, Japan, when he came across an unexpected display—not of a dinosaur, but of a school of fish. It was embedded in limestone shale and exhibited in a corner with no particular fanfare. Yet the 50-million-year-old fossil was clearly extraordinary: 259 tiny fish bodies with eyes and spines and even fins. All but a few faced the same direction, as if frozen mid-swim.

Mizumoto does not specialize in fish or fossils, but he does study the collective behavior of termites at Arizona State University. He became intrigued by the idea that this fish fossil showed collective behavior, too. When fish form schools, they have to coordinate their swimming, staying together without crashing into one another. Continue reading

Natural Surprises

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The world’s boreal forests have been largely earthworm-free since the last Ice Age. But as invaders arrive and burrow into the leaf litter, they free up carbon and may accelerate climate change. Cristina Gonzalez Sevilleja

In my daily scan for information related to the environment, I invariably learn something that surprises me. Like the fact that the earthworm, which provide valuable ecosystem services, can also represent danger on a global scale:

‘Earthworm Dilemma’ Has Climate Scientists Racing to Keep Up

Worms are wriggling into Earth’s northernmost forests, creating major unknowns for climate-change models.

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Earthworms recently have spread to Alaska’s boreal forest. In some areas, the biomass of earthworms is 500 times greater than that of moose, a keystone species. Lance King/Getty Images

Cindy Shaw, a carbon-research scientist with the Canadian Forest Service, studies the boreal forest — the world’s most northerly forest, which circles the top of the globe like a ring of hair around a balding head.

A few years ago, while conducting a study in northern Alberta to see how the forest floor was recovering after oil and gas activity, she saw something she had never seen there before: earthworms.

“I was amazed,” she said. “At the very first plot, there was a lot of evidence of earthworm activity.”

Native earthworms disappeared from most of northern North America 10,000 years ago, during the ice age. Now invasive earthworm species from southern Europe — survivors of that frozen epoch, and introduced to this continent by European settlers centuries ago — are making their way through northern forests, their spread hastened by roads, timber and petroleum activity, tire treads, boats, anglers and even gardeners. Continue reading

History As Told By Trees

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A sample from Siberia, with the core dating from 1637 and the outer ring from 2011, hangs on a wall at the research lab on the University of Arizona campus in Tucson. Adriana Zehbrauskas for The New York Times

Thanks to Jim Robbins, as always:

Chronicles of the Rings: What Trees Tell Us

Studying the historical data stored in centuries-old trees is a burgeoning field, with labs around the world learning more about historical patterns of weather and climate and the effects on humans.

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Wood samples for research at the Laboratory of Tree Ring Research at the University of Arizona. Adriana Zehbrauskas for The New York Times

TUCSON — From the early 1700s until the 1960s, the fast moving river of wind known as the North Atlantic Jet Stream, which drives weather extremes over Europe, was pretty steady on its course.

Then it became less predictable. But instrument data alone can’t tell the jet stream’s movements for comparison over the centuries, given that scientists began keeping records of weather events via instruments only in the late 19th century. Continue reading

Citizen Science Goes Far Afield

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LUISA RIVERA / YALE E360

We have been on watch for citizen science stories since the early days of this platform. Seth had just accepted an offer to work at the Cornell Lab of Ornithology, and typical of him, did his homework on what he had committed to. Since then, dozens of first person and linked-to citizen science stories from other members of our community have appeared in these pages. Thanks to Yale e360 and Jessica Leber for this story about how far and wide the practice has spread, and a few of its more amazing discoveries:

Species Sleuths: Amateur Naturalists Spark a New Wave of Discovery

Scientists have not kept pace with the work of discovering new species. Now, a growing number of committed hobbyists – ranging from a Belgian bus driver to a California cybersecurity expert – are out in the field, igniting a boom in documenting the world’s biodiversity.

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COURTESY OF TERRI CLEMENTS

When mushroom hunter Terri Clements found a unique specimen near her home in Arizona, she couldn’t be certain by its appearance that she’d stumbled across a new species. She tracked down a commercial lab that would process DNA from samples she collected and studied the resulting sequences. Only later did she cold email a mycological scientist, who confirmed her work. As a result, this December, she became part of a team publishing a scientific paper describing her new mushroom species, Morchella kaibabensis, along with three others.

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Mushroom hunter Terri Clements used DNA sequencing to confirm a new species of black morel, Morchella kaibabensis, she found near her home in Arizona.

A former restauranteur and real estate executive who retired in 2012, Clements has no formal scientific training beyond her college microbiology minor. But using a combination of traditional taxonomy — the science of describing, naming, and classifying life on earth — and increasingly accessible DNA classification tools, she’s now hooked on documenting fungi either previously unknown in her region, or, just as often, new to science. “I spend hours and hours on it,” she says. “It’s like a full-time job for which I don’t get paid.”

Her work puts her in the ranks of an increasingly vibrant group of hobbyists busy documenting unexplored species on the planet, ranging from a chemical engineer in France, to a cybersecurity specialist in California, to retirees like Clements. Many study organisms from specific groups of fungi, insects, and other invertebrates that are less charismatic and surveyed than the orchids, birds, and butterflies that have long attracted the public’s interest. Continue reading