Smithsonian Magazine on MSN

Sharklike Fish With Weird, Buzz-Saw Jaws Sliced Through the Seas, Then Vanished. Now, Paleontologists Are Unraveling Their Secrets

These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

Meet The Largest Freshwater Turtle Ever. Hint: Its Shell Was Bigger Than You

This one-ton turtle once ruled South America’s rivers — until a changing planet proved too much for even the largest ...