Megalodon usually gets all the attention when it comes to sea monsters, but ancient oceans were full of predators just as strange and scary. Fossils tell us that long before modern sharks ruled the ...

Great white sharks are already massive, but scientists use their teeth to estimate just how big they can get—and those same methods help unlock the mystery of the megalodon, the colossal predator that ...

New fossil discoveries are forcing scientists to redraw the boundaries of ancient oceans, suggesting that some of the most formidable marine predators did not always stay at sea. From gigantic ...

The biggest, most formidable shark to have ever roamed the ocean may have been even larger than previously thought, according to a new study. The research, published Sunday in the journal ...

CAMBRIDGE — Monstrous is a relative term. No monster’s quite so monstrous, let alone scary, as the ones produced by the human imagination. That’s especially the case when large bodies of water are ...

Geologists in Mississippi unearthed a large vertebra belonging to a Mosasaurus hoffmannii, a giant marine reptile from the late Cretaceous period. The discovered vertebra, potentially the largest ...