Why is one side of the moon called "the dark side of the moon"?

In fact, since the Moon is constantly rotating on it's own axis, there is no area of the planetoid which is permanent darkness, and the far side of the Moon is only completely devoid of sunlight during a Full Moon - when the Sun is facing the Moon with the Earth in between.

Answer// dinosaurs emerged during mesozoic era;

Answerlife is suffering;