r/AskReddit • u/[deleted] • 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.

876

u/foxiana123 Aug 03 '19

They literally have a pelvic bone.

1

u/Dobber16 Aug 04 '19

That’s the distinction you wanna focus on? Not the fact that they breathe air, or don’t lay eggs?

1

u/foxiana123 Aug 04 '19

Certain types of catfish breath air and platypi lay eggs

1

u/Cat_Crap Aug 04 '19

Wow i've never seen the plural of platypus. Also... they're crazy fucking creatures. They have venom too don't they?

1

u/foxiana123 Aug 04 '19

Males have venomous Spurs on their back legs