Comparison, Chindesaurus and Human (IMAGE)

Goldschmidt Conference

Comparison, Chindesaurus and Human

Caption

Scientists have found that increasing oxygen levels are linked to the rise of North American dinosaurs around 215 M years ago. A new technique for measuring oxygen levels in ancient rocks shows that oxygen levels in North American rocks leapt by nearly a third in just a couple of million years, possibly setting the scene for a dinosaur expansion into the tropics of North America and elsewhere. From the Goldschmidt Geochemistry conference, Barcelona.

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prehistoric-wildlife.com/Darren Pepper http://www.prehistoric-wildlife.com/species/c/chindesaurus.html

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