
Here is a brain-teaser for you to solve:
There is a sound on earth that will not produce an echo. No one knows the reason why!
Do you know what it is? No, you can't win a new Corvette or a paid vacation to Iceland, but you can solve the mystery and everyone will know you are a geniusl. Here's a hint:
The sound that will not echo, is not a cowboy's "ya hoo".

Ok gang... figure it out!
Best Wishes,
Chuckwagon