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thrwayyup t1_j7t25kx wrote

Why were the ancient animals so large, initially?

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narudoll t1_j7uly95 wrote

most likely due to the greater concentration of oxygen in the atmosphere as well as an abundance of space// no environmental pressures to limit growth

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thrwayyup t1_j7ushc6 wrote

I almost wonder if we could expect supersized intelligent life evolving on other worlds, but I guess it depends on atmospheric composition.

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Atlas4Pres t1_j7xafcx wrote

Based on studies from 2014, there was actually less oxygen in the atmosphere when dinosaurs were around

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