Fears of the Greek crisis spreading to larger, more crucial markets like Italy and Spain were addressed Friday, when Italy announced plans to speed up austerity measures in order to achieve a balanced budget by 2013.

FORBES: Behind The Downgrade: What's Ailing The U.S. Economy?

Your brain triangulates these signals to keep you balanced, and to move your eyes at exactly the same speed (and exactly opposite direction) as your head so the world doesn't look like it's being filmed by an amateur.

FORBES: Magazine Article