Those Maddening Eyeball Floaters!

You’ve probably seen them before. Mysterious shapes floating just in your field of vision. What do they mean? SciShow breaks it down.

Claude Monet’s Ultraviolet Eye

What happens when one of the greatest artists in history gets cataracts and removes one of his lenses? A messy, colorful vision unlike anything we’re used to. It’s Okay To Be Smart gives us a glimpse.

How Do One-Way Mirrors Work?