The “long-vanished” sea once covered part of what is now mainland ... accompanying other large, prehistoric marine reptiles ...

Researchers have revived prehistoric algae from Baltic Sea sediment nearly 7,000 years old, offering clues about how life evolved.

3 min read During the Ordovician period, part of the Paleozoic era ... For the most part the Earth's climate was warm and wet, with sea levels rising as much as 1,970 feet (600 meters) above ...

3 min read The Cambrian period, part of the Paleozoic era, produced the most ... with a warming climate and rising sea levels flooding low-lying landmasses to create shallow, marine habitats ...