Mean atmospheric O2
Geologic Time Scale
A pair of massive sauropod/titanosaur dinosaurs of the species Isisaurus colberti wander lush plains 70 million years ago in what is today central India.
Formerly known as Titanosaurus colberti, Isisaurus colberti was a leaf-eating herbivore that grew up to 60 feet long and weighed as much as 15 tons.
Copyright © Walter B. Myers. All rights reserved.
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