First, no one is sure why we, or any other animal, dream. During the past century, however, scientists have made significant progress in understanding the factors that influence sleep and dreaming.

A new book, The Rise and Reign of the Mammals by paleontologist Steve Brusatte, explores how our ancestors emerged, evolved, and took over the world. Reading time 10 minutes Deep time is a headache.

National Geographic estimates there are between 50 billion and 430 billion birds populating the planet, outnumbering humans by up to approximately 50 times. Spread across 9,700 species, according to ...

A new study shows that RNA splicing, not just gene expression, holds powerful clues to why some mammals live far longer than ...

A new book dives into the evolutionary history of mammals. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Shortly after dinosaurs got their ...

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Tusks are a striking feature of many animals — elephants, hippos, warthogs, walruses — and are often sought-after by humans. But no birds, fish or reptiles today sport this extreme and ever-growing ...

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Throughout the past 500 million years, our planet has experienced a total of five mass extinctions. One of these – the Permo-Triassic mass extinction event – led to the demise of roughly 90% of ...

Boobs are back. Also, they never went away. This is part of Boobs Week—read the whole thing here. Breasts are usually not the first thing we notice on an elephant. You might have never noticed them at ...