The science of grunting. Really.

Several websites have run articles lately on the noise players at the US Open and other tennis tournaments make when they hit the ball. And, it turns out, they may be on to something. Discovery News reports that a post-doc at the University of British Columbia found that a sound made as a ball is struck significantly slows response time, and affects responses.

Here's a link to a Slate story about the first grunting tennis player, Victoria Heinicke.

And a modern example: