"This is total b.s.; Whales never had legs. This is one of the big lies of science."
No, Senor Galileo. I will NOT look through that telescope. What you saw is NOT TRUE, no matter what. There's no point in looking, because it's not there. [Putting hands over ears and closing eyes tight -- and singing 'LALALALALALALALA -- I can't HEEEEAAAARRRR you!"
He's partially correct. Whales never did have legs nor does science claim so. Whales's ancestors had legs and hippos share these ancestors.