An artist's rendering of Chicxulub, the asteroid believed to have wiped out large dinosaurs and reshaped parts of the world.

What Happened in the Seconds, Hours, Weeks After the Dino-Killing Asteroid Hit Earth?

The Cretaceous forecast: Tsunamis, a deadly heat pulse, and massive cooling.

Temperature-sensitive pikas store grass for winter munching.

How Climate Change Will Transform the National Parks’ Iconic Animals and Plants

Dramatic changes may force park managers to choose which species will live, and which will die

Engraving of a woolly mammoth.

Solving a Mystery of Mammoth Proportions

Dwindling freshwater sealed the demise of the St. Paul woolly mammoths, and could still pose a threat today

Spix’s Macaw, Star of “Rio,” Spotted in the Wild for the First Time in 15 Years

Captured in a backlit cellphone video, the sighting gives conservationists hope for the survival of Brazil's little blue birds

Co-author in the new study, Nick Longrich from the Milner Centre for Evolution at Bath University, poses with some mammal specimens.

The Event that Wiped out Dinosaurs Also Nearly Did in the Mammals

New estimates suggest a measly seven percent of mammals survived the extinction


These Eerie Portraits Capture Endangered and Extinct Animals in a Film That Is Also Vanishing

Denis Defibaugh uses Polaroid 55 film to give animal specimens an afterlife

How to Save the Monarchs? Pay Farmers to Grow Butterfly Habitats

A novel conservation effort aims to fund a habitat exchange to protect the iconic butterflies from extinction

The skeleton of a Steller's sea cow hangs in the Smithsonian National Museum of Natural History

“Mermaid Ivory” Stirs Controversy Over How Extinct Species Are Studied

The carved bones of marine mammals highlight the squishy regulations around their trade and what that means for science

Cu Rua photographed in 2011 during a health check

Beloved Giant Turtle Dies, Leaving Only Three Alive on Earth

The recent death of Cu Rua pushes the Yangtze giant soft-shell turtle to the brink of extinction

Scientists Rediscover a Tree Frog Thought to Be Extinct for Over a Century

Last seen in 1870, Jerdon’s tree frog is alive and (mostly) well in India

This photo of two short-nosed sea snakes alerted researchers to the species' survival, even though they were thought to be extinct for 15 years.

They’re Back: Supposedly Extinct Sea Snakes Have Been Found in Australia

Nearly 15 years later and about 1,000 miles away from the last sighting, the snakes could be making a comeback

The rainforest edge at the Amazon river in Peru

Amazon Tree Census Makes Clear Just How Many Species are in Trouble

More than half of the Amazon's trees could qualify as threatened species

Nola poses for the camera earlier this fall

Northern White Rhinos Now Number Three

The 41-year-old Nola died this week, leaving only three northern white rhinos left in the world

Weak Skeletons May Have Spelled the End for Mammoths

New results suggest that weak bones made the beasts more susceptible to human hunters

A lava fountain on Kilauea Volcano

It Wasn’t Just an Asteroid That Killed the Dinosaurs, Epic Volcanoes Helped

A new study ignites a decades-old debate about what killed the dinosaurs

Early marine arthropods called trilobites disappeared—along with 90 percent of species in the ocean and 75 percent of those on land—at the end of the Permian period.

Massive Volcanic Eruptions Triggered Earth’s "Great Dying"

Geologists nailed down the timing of the ancient event and confirmed that it is a likely suspect in the Permian extinction

A collection of fish teeth and shark scales from the Early Cenozoic period.

After the Dinosaurs Died, Earth Experienced the Age of Fish

The fossil record shows how ray-finned fishes took over the planet's oceans

Asteroid Impacts Once Made the Earth's Oceans Boil for A Whole Year

Life had it rough back then

A giant rice rat specimen from the National Museum of Natural History in Paris, France

How Settlers Wiped Out the Caribbean’s Rodents of Unusual Size

The eradication of rice rats in the Lesser Antilles was part of a massive mammal extinction event

Could we bring back the woolly mammoth?

These Are the Extinct Animals We Can, and Should, Resurrect

Biologist Beth Shapiro offers a guide to the science and ethics of using DNA for de-extinction

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