Scientists have discovered the remains of a mysterious, massive sea creature that grew to lengths exceeding 20 feet and dominated the oceans more than 180 million years ago. A fossil of the creature ...

For years, a massive fossil sat in a museum collection under the wrong name. The specimen, originally cataloged as Tylosaurus ...

Scientists have discovered a giant new species of mosasaur, a powerful marine reptile that ruled the oceans during the age of dinosaurs. The newly identified predator was so enormous and fearsome that ...

Here be monsters, particularly lurking deep beneath the sea. No, not the mythical monsters à la Cthulhu, the Kraken, Scylla, or the Leviathan. There are real monsters hiding way, way down underneath ...

Centuries before modern science could more accurately explain the natural world, brief animal sightings often inspired ...