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9 Fascinating Discoveries that Changed Our Understanding of Human Evolution

A replica of the Laetoli footprints discovered in Laetoli, Tanzania; The original footprints were dated to 3.6 million years ago.

9 Fascinating Discoveries that Changed Our Understanding of Human Evolution

Science Shows Cats Love Even Imaginary Boxes

Luxury living.

Science Shows Cats Love Even Imaginary Boxes

11 Vaccine Pioneers You Should Know

American doctor and epidemiologist Jonas Salk, who developed the first vaccine against poliomyelitis, looks on as a colleague gives the injection to a woman.

11 Vaccine Pioneers You Should Know

Chernobyl May Not Be Habitable for Humans for Another 24,000 Years, But Wildlife Is Thriving

A fox near the Chernobyl power plant in 2017.

Chernobyl May Not Be Habitable for Humans for Another 24,000 Years, But Wildlife Is Thriving

How Disney's Frozen Led to a Breakthrough in Russia's Dyatlov Pass Mystery

The abandoned Dyatlov party tent as it was found by searchers.

Louder Than Traffic: Listen to the Deafening Sounds of a Cicada Chorus

rpbirdman/iStock via Getty Images

Why Are There No Green Stars?

zorazhuang/iStock via Getty Images

Don't Miss the "Ring of Fire" Annular Solar Eclipse in June

Masashi Hara/Stringer/iStock via Getty Images

10 Scientists Who Experimented on Themselves

Jonas Salk works in his laboratory in 1957.

A Skull From the 1845 Franklin Expedition Was Just Identified Using a Descendant’s DNA

John Gregory's actual skull alongside a 3D rendering of his head.

8 Misconceptions About Dreams

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Transporting Rhinos Upside-Down Is 'Vital' to Their Conservation

Rhinos need to be relocated in order to survive.

What Would Happen to The Very Hungry Caterpillar If It Really Ate All That Stuff?

The Very Hungry Caterpillar is looking for its next snack.

15 Magnificent Images from the Hubble Telescope

NASA, ESA, and Hubble Heritage (STScI/AURA), W. Blair (STScI/ JHU) and R. O'Connell (UVA) / TASCHEN

20 Amazing Historical Discoveries in the Last 20 Years

The Staffordshire Hoard contains the one of the richest collections of Anglo-Saxon gold ever found.

On a Limb: How an Octopus Regrows Its Arms

Octopuses never have to say a farewell to arms for long.