In 2008, scientists discovered the fossils of an animal they believed was an ancestor of today's whales. The unique feature of this animal was that it had legs and possible spent a lot of time on land as well as in the water.
No. They never had had feet before.
no dinosaurs were
No they did not
yes
You are!
Hitler was the worst person to ever walk the earth!
Not as whales, no. Marine (sea) mammals (whales, dolphins, etc.) are descended from terrestrial (land) mammals, but they're not identical with those land mammals... among the more obvious changes, they've lost their legs. The related links section has a link to a Wikipedia page showing what some of the distant ancestors of whales might have looked like.
land mammal
no
no.
the blue whale (answer by karl )
clearly Henry brose