Investigate

The Rise and Fall of Tiangong-1, China’s First Space Station

Hanging Out the Wash in the Fresh, Clean Air

A Few Species of Frogs That Vanished May Be on the Rebound

Why Do Cracking Knuckles Make That Sound? You Might Need a Calculator

Chile and Its Scientists Protest Research on Tiny Mummy

Drones Spy Caribou on a Treacherous, Icy Crossing

Earliest Known Human Footprints in North America Found on Canadian Island

Arctic Foxes on a Swedish Mountain Turned ‘Blue.’ It Was a Good Thing.

How to Spot a Nuclear Bomb Program? Look for Ghostly Particles

NASA’s Webb Telescope Faces More Setbacks

China’s Space Station May Crash to Earth on April Fool’s Day

Insects Flew Before Anything Else Did. So How Did They Get Their Wings?

Meet Tess, Seeker of Alien Worlds

Unique Identifiers in Animal DNA

What Makes Some Hair Curly? Not Quite What Scientists Thought

Was a Tiny Mummified Skeleton an Alien? No, but the Real Story Is Almost as Strange

Stephen Hawking to Be Interred at Westminster Abbey

Robotic Fish to Keep a Fishy Eye on the Health of the Oceans

‘These Eagles Are More Than Just a Symbol’

In the Cockroach Genome, ‘Little Mighty’ Secrets

Something’s Brewing in the Lab: Beer Without Hops

Sudan, the Last Male Northern White Rhino, Dies in Kenya

Robert P. Langlands Is Awarded the Abel Prize, a Top Math Honor

AIDS Researcher Top Candidate to Lead the C.D.C.

How Do Squirrels Jump So High?

Astronauts Mark and Scott Kelly Are Still Twins, Despite What You May Have Read

‘Rewilding’ Missing Carnivores May Help Restore Some Landscapes

In Search of the Perfect Hair Dye

Steve, a Famous Northern Light, Stays Mysterious (and Keeps His Name)

Stephen Hawking’s Beautiful Mind

Stephen Hawking: Pop Culture Icon

Stephen Hawking Taught Us a Lot About How to Live

Robert Lightfoot, NASA’s Acting Administrator, to Retire as Trump’s Nominee Is Stalled

Here’s a Newly Discovered Difference Between Alligators and Crocodiles

After a Volcano’s Ancient Supereruption, Humanity May Have Thrived

Watch the High-Flying Physics of a Plant’s Exploding Fruits

U.S. Lifts Ban on Elephant and Lion Trophies

Arizona State Suspends Lawrence Krauss During Inquiry Over Sexual Misconduct Accusations

The Weird World Inside a Pitcher Plant

The Cells That Eat, Regurgitate and Eat Your Tattoos Again

How the Shape of Your Ears Affects What You Hear

Pelican Spiders, Ancient Assassins That Eat Their Own Kind

These Spiders Hunt Their Own Kind

This Hummingbird Chirps Like an Insect. Can It Hear Its Own Sound?

A Supercolony of Penguins Has Been Found Near Antarctica

Why That Sippy Cup Won’t Dry in the Dishwasher

When Did Americans Stop Marrying Their Cousins? Ask the World’s Largest Family Tree