eli5: Why are herbivorous animals usually fatter/bigger than carnivorous animals?
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A carnivorous animal has to be fast enough to catch its prey.
A herbivorous animal has to as well, but plant’s don’t move fast at all.
Being big/fat makes you slower.
So if a carnivore was too big/fat it wouldn’t be able to catch it’s prey.
While being big/fat makes you resistant to a whole lot of things.
So some herbivores became as big as possible, so they could fight off predators, while other kept small so they could run away from predators.
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