According to archaeologists, about 50 million years ago, the earliest whales appeared in the ocean, and the only mammals, but the whales at that time were not the same as today, and it was not until the time of the ancient lizard whales that they really evolved into whales.
The ancient lizard whale, also known as the toothed whale, is a carnivorous whale, 18 meters long, 3 times the length of the great white shark, but it is difficult to imagine such a big guy, the ancestor would be a small, hairy mammal living in trees
It is estimated that the ancestors of whales are likely to have evolved from the Middle Beast, a mammal that lives by the stream, which is only 2.4 meters long and feeds on fish, but after a series of evolutions, it evolved into walking whales
3 million years after the walking whale, the Lord whale appeared, also only 2.4 meters, also belonging to amphibian mammals, but tending to be streamlined in size, and also evolved a large and elastic tail that is suitable for swimming like a whale