Ancient Antarctic Sea Monster May Have Laid This Football-Size Egg. A 68 million-year-old egg the size of a football — the largest soft-shelled egg on record and the second largest egg ever discovered ...

The mosasaur was the apex predator of the seas when dinosaurs roamed land. Geologists working in Mississippi recently stumbled upon an incredible find: the fossil of an ancient marine apex predator.

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A new discovery has revealed a previously unknown species of mosasaur, Jormungander walhallaensi, shedding new light on the oceans of the Late Cretaceous period. Named after the legendary Norse sea ...

Twelve teeth are preserved in one of the nearly complete jaws, while the other has only six present. Two isolated root teeth were also found. The teeth are only an inch long. Details about the ...

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 ...

An artist imagines what Globidens alabamaensis would have looked like when present-day Texas was still submerged. Nathan Dehaut, Journal of Paleontological Sciences Roughly 80 million years ago, a ...