As you might already know, the blue whale is one of the biggest aquatic mammals on the planet whose length sometimes reaches 80 feet. But few people are aware that the “parent” of this underwater giant is a raccoon-sized animal called Indohynus who not only lived on the land but was also a true vegetarian. Over time, the body shape of the Indohynus changed greatly because the animal had to find protection underwater in order to hide from predators.