Science

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Cosmic Call Primer

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Annotated Cosmic Call Primer

A sun-bleached skull is evidence of the first recorded jaguar predation on a black bear, linked to the big cat roaming this terrain.

The Return of the Great American Jaguar

The story of tracking a legendary feline named El Jefe through the Arizona mountains

Why Do We Still Have Morse Code and More Questions From Our Readers

You asked, we answer

To Save the Woodrat, Conservationists Have to Deal With an Invasive Species First: House Cats

On an island in Florida, a rare wild rodent faces a dangerous, feline threat

Computer image of Triopticus skull overlaid on the field site where it was found.

Paleontologists Probe the Bonehead that Foreshadowed Domed Dinos

This striking skull shape evolved at least twice. But what was its purpose?

"Hey guys this sugar is great, but where can we find some morphine?"

Addict Ants Show That Insects Can Get Hooked on Drugs, Too

How researchers got a non-mammal hooked on drugs for the first time

Carmel Johnston (left), crew commander, enjoys her first meal outside the dome.

Space Hub

Astronauts Tell All About Their One Year on “Mars”

In an unprecedented simulation, NASA learned that its astronauts are a bunch of overachievers

The male brown widow spider may not be as unlucky in love as we once thought.

Male Widow Spiders Prefer Younger Ladies—So They Don’t Get Eaten

This strategy means they live to mate again, upending assumptions about these arachnids

Do outdoor cats need to die?

The Moral Cost of Cats

A bird-loving scientist calls for an end to outdoor cats "once and for all"

Some hybrid thrushes varied their routes, suggesting that different genes may influence fall and spring migration.

Migratory Birds May Come Programmed With a Genetic Google Maps

These hybrid avians inherit some mixed directional messages

Are these kinds of experiences worth the carbon footprint?

Age of Humans

Visiting Melting Glaciers Can Be Profound. But Is It Morally Wrong?

How to weigh the moral costs of your climate change tour

A hammerhead caught on a longline.

Is It Too Late to Save Red Sea Sharks?

With anti-fishing laws virtually unenforced, sharks off the coast of Saudi Arabia are being fished to death

Stephen Durham (left) and his father, Michael Durham, gather shells from Fence Creek in Madison, Connecticut.

Age of Humans

Ancient Oyster Shells Are Windows to the Past

Like thousands of soap-dish-sized Rosetta stones, the shells can reveal clues about the past—if you know what you’re looking for

Researchers fear that these normal monk seal encounters could soon grow deadly.

Why Rare Hawaiian Monk Seals Are Lining Up to Get Their Shots

Fearing devastating disease, researchers are vaccinating a wild marine mammal for the first time

In an artist's interpretation, the forested and warm Late Cretaceous is abruptly destroyed by a six-mile wide asteroid.

Life Bounced Back After the Dinosaurs Perished

The devastation was immediate, catastrophic and widespread, but plants and mammals were quick to take over

Timelapse Footage of a Giant Caterpillar Weaving Its Cocoon

For six weeks, luna moth caterpillars gorge themselves on the leaves of the marula tree. Then, when they're ready, they instinctively weave giant cocoons

The lowly urban rat deserves our attention.

In Defense of Studying City Rats

By placing a taboo on researching these “disease sponges,” we leave ourselves at their mercy

Why Do Giraffes Have Patches?

The dark patches on a giraffe's body hide an intricate network of blood vessels and glands. These allow blood to flow through them, releasing heat

Batang and her infant are doing well and Zoo staff report she is nursing the new male Bornean orangutan.

UPDATE: Meet the National Zoo's Latest Bouncing Baby—an Orangutan (New Video)

A historical birth of a male Bornean orangutan, the first in 25 years, took place in Washington, D.C.

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