It's well-known that there are colors that humans can't see. But now in this easy tutorial by popular science teacher Robert Krampf, you can see one of these colors that are not visible to the human eye. It's a neat trick to impress your friends, but keep in mind it's still just one color and there are more that we are missing out on. To better understand how we perceive color, check out Big Think's interview with philosopher Alva Noë.


Image credit: Nagarjun/Flickr