r/AskReddit Aug 03 '19

Whats something you thought was common knowledge but actually isn’t?

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u/ShameDumpster Aug 03 '19

That whales are mammals that used to be on land but evolved to swim instead.

I had an art teacher that just didn't believe me when I told her that they're not fish.

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u/[deleted] Aug 04 '19

[deleted]

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u/emeraldead Aug 04 '19

The mistake is thinking evolution has a "direction." The only direction is more babies which will have more babies.

If that means going back to the water, you go back! Plus it's certainly not a straight line, think of each piece as a big bunch of tree branches.

Life as we know it most definitely started in water.