Prehistoric time line, geologic time scale ... The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles. Dinosaurs ruled the Earth in the mighty ...
Organically Human on MSN12d
Earth's Deepest Hole: The End of an EraSoviet scientists embarked on an ambitious quest to dig into the Earth's crust, creating the world-renowned Kola Superdeep ...
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