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Darwinius massilae hand

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animal. Amphibian. Frog. Anura. Ranidae. Frog in grass.

Abundant Animals: The Most Numerous Organisms in the World

Skeleton fossil record of ancient reptiles in stone.

Do Fossil Fuels Really Come from Fossils?

cat. orange and white persian cat with long hair, snarl, growl, teeth

7 Questions About Mammals Answered

Discover

Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)

Cruel and Unusual Punishments: 15 Types of Torture

Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

Mother tickling her daughter, sitting in a garden

Why Can’t You Tickle Yourself?

Ruminant. Deer. Red deer. Cervus elaphus. Buck. Stag. Antlers.

9 of the World’s Deadliest Mammals

Cleopatra hieroglyphic carving the Ancient Egyptian queen Cleopatra. Wall of the Temple of Horus at Edfu, Egypt.

What Did Cleopatra Look Like?

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Saguaro cacti dot the Sonoran Desert landscape at Saguaro National Park, Arizona. Formerly Saguaro National Monument cactus

Can You Drink Water from a Cactus?

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Darwinius massilae hand

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Taung child Ardi Lluc Petralona skull