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A comment on How Dinosaurs Shrank and Became Birds.

Re:How Dinosaurs Shrank and Became Birds by Radle on Wednesday June 03, 2015 @01:55AM (#9650800)
Simple version: The amount of Oxygen in the air decreased, giving the Dino-birds less energy. so they became smaller.

Also air with less Oygen is lighter, another good reason for Dino-birds to loose weight.

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Re:How Dinosaurs Shrank and Became Birds by cchip on Wednesday June 03, 2015 @08:15AM (#9651973)
On the contrary: The amount of CO₂ decreased. I see more of a correlation between CO₂, big plants (food supplies) and animals.
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