This optical illusion discovered by Aristotle is still a brain-twister

It's time for another bracing reminder that your brain is a screw-up and your eyes are liars. This particular illusion is known as the Motion Aftereffect Illusion. It's pretty simple. Look at enough motion steadily and your brain will get tired and punk you for fun. You can even do it with a real waterfall. Find out… » 11/20/12 1:27pm 11/20/12 1:27pm