Could Spinosaurus swim? A new fossil with a scimitar-like head crest provides new evidence on the unsettled question.

Millions of years before the Sahara became a desert, it was a vibrant ecosystem. Bordering the ancient Tethys Sea, which broke up the supercontinent Pangaea, the region was home to massive dinosaurs, ...

A UChicago-led team unearthed ‘Spinosaurus mirabilis,’ a fish-eating giant and the first new species of its kind in a century, where nothing like it was supposed to exist ...

Millions of years ago much of Mississippi was underwater and dugongs, sometimes called sea cows, roamed the warm coastal waters.

Few national Democrats have pushed back as forcefully against Trump’s authoritarian crackdown. There’s a reason for that.

Until now, estimating how old a dinosaur was when it died has been a fairly simple process: Count up the growth rings in the fossilized bones. But... Searching for dinosaur secrets in crocodile bones ...

Until now, estimating how old a dinosaur was when it died has been a fairly simple process — just count up the growth rings in its fossilized bones. "We always thought that those rings were formed ...