By Eddy Montilla.
Most kinds of mammals don’t lay eggs, give birth to live young and produce milk to feed them. They are warm-blooded and air-breathing and live on land. The whale belongs to this group, but lives in the water. Why?
Whales, in the beginning, were land mammals, but observe that these animals are very big and need, therefore, tons of food to live. This pressing need forced them to spend more time near mouths or go to the sea looking for more food: fish and shellfish. In order to facilitate the process of surfacing for air, mutations moved whale noses farther and farther back to a point that they are located today on their backs. So, whales evolved to live in water through a process of natural selection in order to satisfy their need for food.
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