Why were prehistoric era animals so gigantic in comparison to animals from the “modern era”

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Why were prehistoric era animals so gigantic in comparison to animals from the “modern era”

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Anonymous 0 Comments

What, you mean like why aren’t there mammoths and massive tigers and suchlike? Because humans killed them.

If you mean like dinosaurs – it’s because air was more oxygen rich back then. Nowadays you just aren’t going to get enough oxygen into your lungs to be that big

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