Extinction

Female northern white rhinos Najin and Fatu are the last of their species and reside at the Ol Pejeta Conservancy in Kenya.

World's First IVF Rhino Pregnancy Could Save a Nearly Extinct Subspecies

Only two northern white rhinos remain, but the new reproductive breakthrough may pull them back from the brink of erasure

The 2023 Doomsday Clock on display before a Bulletin of the Atomic Scientists event on January 24, 2023. The Bulletin has been setting the clock since 1947 based on analysis of threats facing humans from technologies people have made. 

Doomsday Clock Stays at 90 Seconds to Midnight Amid Climate Change, War and A.I.

For the second year in a row, the clock is the nearest it has ever been to signaling our total annihilation

To understand Elma's life, researchers cut her tusk lengthwise and took samples to study the elements present in the ivory.

Meet Elma, a Woolly Mammoth Who Roamed Far and Wide More Than 14,000 Years Ago

By analyzing a fossilized tusk, scientists have pieced together the animal's movements

An artist's impression of Gigantopithecus blacki near a forest in southern China.

What Caused the Mysterious Extinction of 'Giganto,' the World's Largest Ape?

The massive primates were unable to shift their diet to keep pace with a changing climate, according to a new study, forcing them to eat less nutritious bark and twigs

A California grizzly bear specimen at the Santa Barbara Museum of Natural History. The brown bear subspecies went extinct around 1924.

California Grizzlies Weren't as Big—or Bloodthirsty—as People Once Thought

The now-extinct bears were mostly vegetarians and measured about the same size as today's North American grizzlies

This A.I.-generated illustration shows what some of the undiscovered extinct birds might have looked like.

Humans May Have Driven Twice as Many Bird Species to Extinction as Previously Thought

Statistical modeling of undiscovered extinctions suggests 1,430 bird species have disappeared during modern human history

A De Winton's golden mole. A member of the species hadn't been definitely seen since 1936.

Scientists Uncover a Golden Mole Species Thought to Be 'Possibly Extinct'

A scent-detecting dog led the team to the discovery in South Africa, and traces of mole DNA helped confirm it

The jawbone likely belonged to a Columbian mammoth.

Fossil Hunter Pulls Massive Mammoth Jawbone Out of Florida River

John Kreatsoulas, who made the discovery while diving in southwest Florida, initially thought the 60-pound mandible was a log

Dust from the Chicxulub impact may have plunged the planet into a cold, dark winter and halted photosynthesis.

Dust May Have Triggered the Global Winter That Killed the Dinosaurs

A new study, based on modeling, suggests fine silicate particles could have blocked sunlight and shut down photosynthesis across the globe

The now-extinct golden toad in a 1978 picture taken in Costa Rica.

Climate Change Is Pushing Many of the World's Amphibians Closer to Extinction

Just over 40 percent of amphibian species are at risk of going extinct, and humans' fossil fuel use is partly to blame, according to a new assessment

A Tasmanian tiger at the Hobart Zoo in Tasmania. The last known living Tasmanian tiger died at the zoo in 1936.

Scientists Collect First RNA From an Extinct Tasmanian Tiger

No other RNA has ever been extracted from an extinct species, so the breakthrough opens doors to understanding the biology of long-gone organisms

The Crystal Palace Dinosaurs are the world’s first attempt to model prehistoric animals at full scale.

How a Victorian Dinosaur Park Became a Time Capsule of Early Paleontology

A new sculpture and an upcoming restoration are breathing life into the Crystal Palace Dinosaurs, one of 19th-century Britain’s most curious creations

An ancient bison gets stuck in a tar pit as a fire burns nearby in this illustration. A warmer and drier climate could have made Southern California vulnerable to human-caused fires at the time, the new study suggests.

Human-Caused Fires and a Changing Climate May Have Contributed to Mass Extinction 13,000 Years Ago

The deadly combination likely led several species to disappear from Southern California during the late Pleistocene

An artist's interpretation of what Perucetus colossus would have looked like when it lived some 38 million years ago

This Massive Extinct Whale May Be the Heaviest Animal That Ever Lived

The newly discovered behemoth could unseat the blue whale for the title, but scientists can only make educated guesses about its weight

An artistic reconstruction shows a group of Burgessomedusa phasmiformis swimming in the Cambrian sea.

These 508-Million-Year-Old Fossils May Be Earth’s Oldest Swimming Jellyfish

Researchers found the rare remains in Canada

Scientists found that carvings on the bones of giant sloths were made within a few years of the animals' deaths.

Humans May Have Arrived in the Americas Earlier Than Previously Thought

Researchers say that humans coexisted with giant sloths in Brazil some 25,0000 years ago

An illustration of the Victorian grassland earless dragon, which, until February, had not been seen in the wild since 1969.

Scientists Find the 'Extinct' Victorian Earless Dragon, Not Seen Since 1969

Once thought to be gone from the wild, the lizards will now enter a breeding program in an attempt to save them from the brink of extinction

The massive sharks known as megalodons ruled the oceans for some 20 million years.

Megalodons Were Warm-Blooded—and It Was a Blessing and a Curse

The giant sharks likely warmed some of their body parts, helping them grow massive but leaving them vulnerable to environmental changes, a new study finds

An illustration of the giant gorgonopsian Inostrancevia scaring off the much smaller African species Cyonosaurus

During the 'Great Dying,' This Saber-Toothed Predator Reigned

This ancestor of mammals briefly thrived amid a massive extinction event, hinting at how carnivores may respond to climate change today

Mammoth and elephant tusks are elongated incisors, so they're made of the same materials as other teeth.

Male Woolly Mammoths Had Testosterone-Fueled Aggressive Episodes

By studying preserved tusks, scientists suggest the mammals experienced a yearly condition known as musth, like male elephants do today

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