On echolocation....
While certaihly many animals have highly 'tuned' echolocation skills, the claims re: 'How did RM&NS create the bat's echolocation system?' are really just examples of grandiose hyperbole.
I can echolocate. That is to say, humans can echolocate. Can we pinpoint a bug in the dark? Doubt it, but we can and do echolocate all the time.
Try it - turn off the lights/shut your eyes (no cheating!) and try to navigate through your home. I suggest shuffling your feet or making some sort of subtle noice (hissing works well for me). As you get closer to a wall or a large object, the sound gets more intense. And vice versa. Blind people employ this subtle echolocation quite well, and there are even training programs to teach them how to echolocate using metal clickers. I saw a demo of this system and the participants could tell things like the texture of, height of, and distance to 'targets'.
So, what, EXACTLY, is this 'echolocation apparatus' that I keep reading about that is impossible to have arisen via natural means?
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