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Ancient oceans

Green Impact Scientists find evidence for several Earth axis shifts during the age of dinosaurs

Sea-level changes offer an independent record of dramatic Jurassic and Cretaceous episodes when the solid Earth may have reoriented.

Green Impact Ancient ocean chemistry may explain how Earth kept its oxygen Joshua Shavit

Discoveries Ancient animal feces may have helped transform Earth’s oceans 540 million years ago Joseph Shavit

Discoveries ‘Shark graveyard’ in Egypt’s Western Desert reveals a lost tropical sea from the age of the dinosaurs Hannah Shavit-Weiner

Green Impact How animal feces became an evolutionary force 540 million years ago Joseph Shavit

Discoveries Scientists finally confirm the cause of Earth’s greatest mass extinction Joseph Shavit

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