pelycosaur

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Happy, smiling, flying pig

7 Everyday English Idioms and Where They Come From

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

10 Famous Artworks by Leonardo da Vinci

Sydney New Years Eve Fireworks

Why Does the New Year Start on January 1?

The Battle of New Orleans, by E. Percy Moran, c. 1910. Andrew Jackson, War of 1812.

26 Decade-Defining Events in U.S. History

Time zone map with standard time zones and International Date Line

Why Are Some Time Zones 30 Minutes Off Instead of an Hour?

Aphrodite. Greek mythology. Sculpture. Aphrodite is the Greek goddess of love and beauty.

12 Greek Gods and Goddesses

World Data Locator Map: Australia

Is Australia an Island?

pelycosaur: Media

fossil tetrapod order

Images

Dimetrodon

Dimetrodon

Dimetrodon, an extinct relative of primitive mammals, lived from about 286...

Encyclopædia Britannica, Inc./Patrick O'Neill Riley

Edaphosaurus

Edaphosaurus

The pelycosaur Edaphosaurus. Neither reptiles nor dinosaurs, pelycosaurs...

Encyclopædia Britannica, Inc.