Flatline on a heart monitor

The Lazarus Phenomenon, Explained: Why Sometimes, the Deceased Are Not Dead, Yet

What does CPR have to do with the curious case of clinically dead patients coming “back to life”?

T. rex had tiny arms. But that’s no reason to mock the dinosaur.

Stop Making Fun of Tyrannosaurs’ Tiny Arms

The stubby limbs may seem out of place, but they may have been key to the T. rex’s terrifying bite

In a reconstruction, by artist John Gurche, the Smithsonian's Natural History Museum displays what the Hobbit would have looked like in the Hall of Human Origins.

“Hobbits” Disappeared Much Earlier Than Previously Thought

If the tiny hominins ever coexisted with modern humans, the arrangement apparently didn’t last long

Pluto’s ‘heart’ is a giant crater that may be slowly moving across the dwarf planet’s surface, scientists say.

Pluto May Have a Wandering Heart

The enormous impact basin may be slowly traveling across the dwarf planet’s surface

An ant of the species Iridomyrmex purpureus (center) lifts a leg in an aggressive display when she encounters ants from a different nest.

Antennae Yield New Clues Into Ant Communication

Despite more than a century of study, scientists still have much more to learn about the complex world of ant communication

The Right Body Language Can Boost Odds of Online Dating Success

Potential partners size you up in seconds, and the way you sit or stand matters

A crackmeter in action, measuring the gaps between a rock sheet and a rock wall

Why Rockfalls Happen on Beautiful Days in Yosemite

Temperatures drive rocks to expand and contract—until one lovely day when slabs may suddenly fall

Coquerel's Sifaka (Propithecus coquereli) trio in trees, Ankarafantsika National Park, Madagascar

Why People Turn to Lemurs and Other Endangered Animals for Dinner in Madagascar

A close look at trade in bushmeat finds that consumption is common and out in the open

An adorable shelter dog shouldn’t have a difficult time finding a home—but it might if it comes with the label “pit bull.”

Call a Dog a Pit Bull and He May Have Trouble Finding a Home

Dogs labeled as pit bulls at shelters may wait three times longer to be adopted—even when they aren’t actually pit bulls

What’s It Like in Space? Ariel Waldman Has the Answers

The NASA adviser and author of a new book gives some insight on living beyond the Earth’s atmosphere

What a Tiny Fish Can Tell Us About How Humans Stood Upright

What is the root of why our ancestors gained the power to walk on two feet and chimpanzees didn’t?

The green color of the superb startling’s wing feathers is produced by microscopically structured surfaces that interfere with and scatter light.

Art Meets Science

The Extravagant Beauty of Feathers

A new book spotlights the astonishing diversity of avian plumage

How Do Butterflies Fly and More Questions From Our Readers

You asked, we answered

Giraffes make their way across the Mara River. Whether they’re ambling or galloping, giraffes maintain balance by moving their necks in synchrony with their legs.

What Elephants, Zebras and Lions Do When They Think No One’s Watching

The stunning results when a photographer uses remote cameras to capture Africa’s great beasts

Astrophysicist Kip Thorne dared to dream of a machine to find gravitational waves.

Think Big

The Detection of Gravitational Waves Was a Scientific Breakthrough, but What’s Next?

Scientists are sitting on top of the world after this monumental discovery and are eager to keep exploring the universe

When Dinosaurs Roamed the (Not Yet) Petrified Forest

Recent surprise discoveries at the national park have prompted a complete rethinking about the creatures of the Jurassic Era

The Ichthyornis is a toothed bird that links birds with reptiles.

The “Sistine Chapel of Evolution” Is in New Haven, Connecticut

Charles Darwin never visited the Yale museum, but you can, and see for yourself the specimens that he praised as the best evidence for his theory

Local actors Judy Barth, Ruth Ochsenrider and Jim Barth peer over photos of original Scopes Trial jurors during the annual Scopes Trial Festival in Dayton, Tennessee.

How Much Has the Town Where the Scopes Trial Took Place Evolved Since the 1920s?

Each July, Dayton, Tennessee, celebrates its role in the famous court case with a re-enactment and festival

Zacharia Muinde of Map Kibera Trust shows teachers and students their school's page on Open Schools Kenya, a mapping project that helps residents find information on local schools.

Age of Humans

DIY Cartographers Are Putting Slums on the Literal Map

When a community makes its way onto a map, it’s that much harder to deny, say activists.

Stalactites hang inside of Australia's Jenolan Caves, each one a record of Earth's past.

Caves Can Now Help Scientists Trace Ancient Wildfires

But the chemical clues for fire add an unexpected snarl for researchers using those same caves to track climate change

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