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Science

Based on Andrewsarchus’ skull size and the skull-to-body-size ratios of other hoofed predators called mesonychids, scientists estimated in 1924 that the beast was more than 12 feet long and about 6 feet tall. Reassessments of Andrewsarchus’ evolutionary tree, however, suggest this estimate is inaccurate.

This Giant Carnivore Ran on Hooves. Scientists Are Investigating Its Massive Skull and Crushing Teeth to Decipher the Beast’s True Nature

For more than a century, paleontologists have been piecing together how the mysterious predator Andrewsarchus is related to other mammals, like the extinct “hell pigs” and “wolves with hooves”

The Ennedi Natural and Cultural Reserve, in eastern Chad, encompasses 19,300 square miles of a vast sandstone plateau.

The Sahara Desert Hasn’t Always Been a Dry, Desolate Landscape. Some Scientists See Signs It May Be Greening Again

Petroglyphs on sandstone at a national park in Chad bear witness to wildlife that once roamed the area before the continent’s water largely receded 6,000 years ago. Could it return?

Bird flu devastated a colony of northern gannets, seabirds almost the size of albatrosses, on Bass Rock in Scotland. Researchers working with the birds are holding onto hope that the breeding population will slowly build the colony back.

After a Devastating Bird Flu Outbreak, Scotland’s Seabirds Are Slowly Recovering—and So Are the Scientists Who Witnessed Their Decline

The world’s largest colony of northern gannets was decimated by bird flu in 2022. Now, as their numbers climb again, researchers are collecting data to understand the virus’ lasting effects

Two livestock guardian dogs, both akbash and Great Pyrenees mixes, stand among their flock at a ranch run by the prominent dog-breeding Buchholz family.

When Coyotes Threatened Livestock on Central Texas Ranches, the Solution Was to Unlock an Ancient Ability in Dogs

Killing the predators is not nearly as effective as the intimidating presence of well-trained guardians, a role some breeds have played for 5,000 years

Once treated by humans as prey, horses became key to transportation, warfare, trade and companionship. Their history is intertwined with our own.

Gallop Into the Year of the Horse With These Five Amazing Equine Discoveries

Since their domestication, horses have changed the course of human history. It’s no wonder the Chinese zodiac associates them with prosperity and success

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There's More to That

The Tragedy of the Alps’ Disappearing Glaciers for Those Who Live, Visit and Ski There

Warming temperatures are wreaking havoc at elevation, upending the Winter Olympics and the tourism industry and imperiling communities

Paleontologists have found early examples of theropods, the group that would eventually include tyrannosaurs. But precisely how another group of dinosaurs, known as the bird-hipped ornithischians, evolved remains a major question in paleontology.

An Asteroid Ended the Age of the Dinosaurs. But How Did Their Reign Begin? Mysterious Early Reptiles May Hold the Answer

Researchers are uncovering the evolutionary steps that set the stage for dinosaurs to rule the planet

Scientists found that fringe-lipped bats have a roughly 50 percent success rate when trying to capture prey.

These Lazy Bats Are Super-Efficient Killers That Carefully Conserve Energy to Attack at a Moment’s Notice

Wild fringe-lipped bats spend just one-tenth of the night in flight, but they can precisely snatch a calling frog and nab prey that rivals their own size

For their scale, these microbes are faster and more resilient than any human athlete.

If Microbes Entered the Olympics, These One-Celled Superstars Would Win Gold

They race, they spin, they shoot. Meet the organisms for which physical prowess is more than sport—it’s a matter of life and death

A skier takes advantage of several inches of snow covering blanketing the landscape, including trees that resemble piles of cotton balls, on Revelstoke Mountain in British Columbia.

These 15 Inspiring Images of Winter Sports Will Help You Rediscover Your Olympic Spirit

You don’t have to be an Olympian to enjoy these snowy activities

Sceptobius beetles groom ants to steal the pheromones that they produce. The beetles cloak themselves in those pheromones to match the scent of the ant colony, gaining the ability to live among the ants undetected.

These Beetles Are Entirely Dependent on Ants for Survival. Here’s Why That’s Not an Evolutionary Death Sentence

Rove beetles cloak themselves in ant pheromones to sneak into the insects’ nests for protection. But in an odd catch-22, that makes them forever reliant on their hosts

A juvenile harbor seal lies on a beach in the Netherlands.

Seals Are Seemingly Vanishing Off the Dutch Coast. These Scientists Are Trying to Get to the Bottom of the Mysterious Disappearances

Recent counts of the Wadden Sea’s adult harbor seal population have revealed a surprising trend of decline, prompting a consortium of researchers to investigate whether the animals are dying off, relocating or experiencing something else altogether

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Here Are 250 Places to Visit to Celebrate America’s 250th Birthday. How Many Have You Been To?

Journey around the nation with this interactive map, divided by region or category, and discover American history in a way you’ve never seen before

The small dinosaur Patagonykus—one of an odd-looking group called alvarezsaurs—puzzled experts with its stout claws and bird-like bones.

Small, Stubby-Armed Dinosaurs Have Confounded Paleontologists. Are Answers Finally Within Reach?

Recent discoveries about an alvarezsaur called Manipulonyx have drawn renewed attention to this group of bird-like, clawed creatures and the mysteries around their anatomy and behavior

A Brazilian keelback (Helicops infrataeniatus) cannibalizes another in 2015.

Cannibalism Among Snakes Is Far More Widespread Than Previously Thought

Scientists undertook the first comprehensive assessment of how often snakes eat their own, uncovering reports of the behavior in more than 200 species

Outbreaks of crown-of-thorns starfish have threatened the Great Barrier Reef since the 1960s.

These Hungry Starfish Are Spiraling Out of Control in Australia. Now Scientists Say They Have a New Plan to Fight Back

Synthetic pheromones may be a promising tool in attracting and culling troublesome crown-of-thorns starfish, which rapidly eat large amounts of coral on the Great Barrier Reef

Shovel-tusked elephants like Amebelodon were discovered nearly a century ago, and paleontologists have learned more about their anatomy and behavior with time. This 1932 illustration was later found to be inaccurate, as Amebelodon actually had a longer and narrower trunk.

Strange, Shovel-Tusked Elephants Puzzled Paleontologists, Until Experts Took a Closer Look at Their Teeth

The animals’ extended lower jaws were seemingly made for scooping, but research over the past few decades has found they could do a lot more than initially expected

A gentoo penguin peers up from its colony’s nesting grounds on Booth Island, in the Antarctic Peninsula. The species, an adaptable forager that can switch prey when krill are scarce, has expanded into parts of the Antarctic Peninsula that were once too icy to inhabit.

The Penguins That Thrive—and the Ones Left Behind—as Antarctica Warms

A new decade-long study tracked 37 penguin colonies and found that the birds are breeding earlier. The shift marks one way among many that climate change is transforming life at the bottom of the world

Icicles form on a fence and reflect the blue sky after an ice storm.

Smithsonian Photo Contest Galleries

Get an Eyeful of These 15 Photos of Incredibly Cool Icicles

Nature’s wintry accessory, icicles help beautify snowy landscapes

The Lucas Museum of Narrative Art is finally set to open in L.A.’s Exposition Park on September 22.

These Are the Top Ten Most Anticipated Museums Opening Around the World in 2026

New institutions dedicated to digital art, exploration, hip-hop, conservation and more are expected to welcome visitors this year

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