Why Did Whales Return to the Ocean Around 50 Million Years Ago? — Here’s What Evolutionary Clues Reveal
Around 50 million years ago, if you saw a whale, you probably would not even recognize them. It is because they are not yet the large animals that have come to live in the oceans. Instead, they look more like dogs than the marine mammals they are today. They lived and walked on land, but … Read more


