Feels like there was a lot more megafauna in prehistoric earth than there are today
In: 20
Dinosaurs were huge.
Nothing before or after them were that large.
Some of the mechanism of why are understood, but ultimately we don’t really know.
Mammals were a lot bigger, but the world has been getting warmer which makes those sizes impractical for mammals (they get too hot).
Before the dinosaurs, animals were roughly equivalent to post-dinosaur sizes. Probably on the smaller size compared to mammals before humans came along.
Also, it should be noted that modern whales are massive.
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