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Science / Wildlife

A mountain lion, P-22, known to live in the Los Angeles area

L.A.’s Cougars Were Driven to Extremes by Wildfire

With less suitable habitat, the big cats traveled further and crossed dangerous roads more often

Shark skin is made of tiny, stiff segments of overlapping, textured dentin and enamel. Shark skin’s distinctive texture gives sharks greater efficiency moving through the water.

Shark Skin-Inspired Materials Have a Long Way to Go Before They Work Like the Real Thing

The predator’s distinctive texture is the envy of engineers trying to maximize hydrodynamics

The first juvenile collector urchin (Tripneustes gratilla) raised from a cryopreserved embryo.

Planet Positive

A Graduate Student’s Research Could Help Stop the Spread of Invasive Seaweed in Hawai’i

For the first time, using cryopreservation to freeze sea urchin embryos may help restore coral reefs

A golden-winged warbler perches on a branch in Minnesota. The bird’s declining population worries ornithologists.

More Than Half of U.S. Bird Populations Are Shrinking

An alarming report indicates that dozens of species are likely to become federally endangered without preventive action

An artist’s reconstruction of Scleromochlus taylori, an ancestor of pterosaurs

The Ancestors of Flying Pterosaurs Were Sleek Reptiles That Ran on the Ground

High definition scans of a fossil reveal the form of an early pterosaur relative

Photographed on September 14, 2022, 480 Otis is the reigning 2021 Fat Bear Week champion.

How the Bears at Alaska’s Katmai National Park Became Celebrities

Park officials had no idea that the installation of live nature cameras at Brooks River ten years ago would lead to the wildly successful Fat Bear Week

The elkhorn coral is one of the most endangered corals in the Caribbean and the Florida Keys. In Florida alone, the population is reduced by over 95 percent. A coral breeding project using elkhorn coral gametes collected in Florida and Curaçao hopes to give this species a new lease on life. 

This Moonshot for Coral Breeding Was Successful

But the coral are still in tanks, waiting to be released on reefs

Five-day-old red-eyed treefrog embryos are tightly curled inside dehydrated eggs packed closely together. It’s dry enough to make them begin to hatch early amid heating.

Panama

When the Heat Is on, Red-Eyed Treefrogs Hatch Early

The embryos make the move from clutches on leaves to rainforest ponds below

An artist’s reconstruction of Qianodus duplicis, the earliest known fish that had a mouth with teeth

Haul of Fossil Fish Pushes Back the Origin of Teeth and Jaws

The unexpected finds illustrate life during a critical and little-understood time period

A European eel swims in the Baltic Sea. 

The Utterly Engrossing Search for the Origin of Eels

To save the endangered animals, researchers have been working for decades to figure out where they reproduce

A bull walks in front of a cow. If they mate, the bull’s sperm will likely cluster together as they swim through the female’s reproductive organs.

Bull Sperm Get by With a Little Help From Their Friends

Traveling together helps the sperm navigate a tricky, sticky migration through a cow’s reproductive tract

One reader wonders: Why did ants make it all over the Americas while anteaters didn’t?  

Why Do Anteaters Live Only in the Tropics and More Questions From Our Readers

You’ve got questions. We’ve got experts.

After the manta ray filters out the tiny plankton from the water it ingests, the excess water exits through the dark gill slits on the ray's ventral side. 

Planet Positive

Why Conservationists Are Hopeful About the Manta Ray’s Future

The giant fish faces threats from poachers, boat strikes and climate change

About two to three million birds of prey fly through Panama each fall, in what amounts to the world’s third-largest raptor migration.

Panama

Watch Millions of Raptors Fly Across Panama This Fall

The country’s unique shape makes it a perfect migratory pathway for the birds of prey

Along the Vietnamese coast, temples constructed in reverence to whales and other marine mammals—such as this one in Phan Thiet—house valuable information on the country’s little-studied cetaceans.

Inside Vietnam’s Whale Temples

Centuries-old whale worship shrines are shedding light on the diversity and distribution of marine mammals off the country’s coast

A Haast's eagle hunts moa.

How a Giant Eagle Once Came to Dominate New Zealand

Before the formidable bird went extinct, scientists say it likely hunted the flightless moa

Migrating waterbirds over South Dakota’s Huron Wetland Management District on North America’s Central Flyway.

Scientists Are Using These High-Tech Tools to Study Bird Migration

Tracking the journeys of different species is key to protecting them from habitat loss and other threats

Lions in South Africa’s Greater Kruger National Park are feared by many different prey animals, which will run away as soon as they hear a lion growl.

How Animals Survive in a Savanna Full of Predators

Ecologists have documented a hierarchy of fear in the South African grassland, and the king of beasts is at the top

A male bison atop an arid hillside on Santa Catalina Island in California.

The Uneasy Future of Catalina Island’s Wild Bison

One of Hollywood’s weirdest legacies, the herd of beasts lives under the watchful eye of local conservationists

Birds that wander out of their home ranges can be an unexpected source of revenue. Stella, a Steller’s sea eagle, recently turned up in Maine and Massachusetts, drawing tourists who spent nearly US $500,000.

Birds Wandering Far From Home Can Be a Boon for Local Tourism

When an internet-famous Steller’s sea eagle turned up roughly 11,000 kilometers off course in late 2021, birders flocked to catch a glimpse

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