There was no civilization back then, no cities, no countries, no people, but the land was there, so take a look at this map. It pictures the Earth during the late Paleozoic, when all land was ...

The Paleozoic Era, which ran from 541 million to 251.9 million years ago, was a time of great change on Earth. The era began with the breakup of one supercontinent and the formation of another.

Prehistoric time line, geologic time scale, photos, facts, maps ... that time. Earth formed and oxygen levels rose in the foundational years of the Precambrian. The productive Paleozoic era ...

Geologists have produced a new timeline of Earth's Paleozoic climate changes. The record shows ancient temperature variations coinciding with shifts in planet's biodiversity. The temperature of a ...