http://www.npr.org/templates/story/story.php?storyId=130772438
Those who have trouble with reading comprehension can even listen to the
story.
You can learn more about the guy who figured this out and how he figured
it out here:
http://en.wikipedia.org/wiki/John_Tyndall
Mike, he did this about 150 years ago? Did this make the newspapers back
then? You're old enough that you read them hot off the presses.
Jeff