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Comment by levocardia

5 days ago

Real answer: how many animals can you think of with three legs?

There are millions or billions of quadrupeds surviving on 3 legs every day. 4 legs is evolutionarily superior to 3 but 3 gets the job done, especially if you don't have to worry about agility or repair.

How many animals have wheels? And yet wheels are a pretty practical choice for a lot of things.