The Flights of Fancy

There is a living to be made at night. A very large number of mammals are nocturnal. I see a possum around here. Sometimes he looks up and sees me. It does not freak him out at all. He doesn't move faster. And it's partly the evolution of flight. So true flight has evolved four times in birds, bats, terosaurs and insects. They fly properly in the sense that they stay up indefinitely. There are plenty of other animals that glide. But they just are full within a controlled way.