The answer is evolution and the question is, "Why do bats hang/sleep upside down?" When bats begin flying it was more like how flying squirrels glide. Over time their limbs became more powerful from all the gliding and evolved into wings but since bats don't have hollow bones like birds they don't have the capacity for much lift so they drop into flight from their upside down position. The upside down position also protects them from predators and unlike humans their heart has no problem with pumping blood through their bodies when they're upside down for long periods.
No comments:
Post a Comment