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 ...

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 ...

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.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Tusks are a ...