All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
An Australian study found that homework is of little to no academic value to students in elementary and junior high schools.
32
Genghis Khan exempted the poor and clergy from taxes, encouraged literacy, and established free religion, leading many peoples to join his empire before they were even conquered.
28
Cuban rescue workers use sniffer rabbits to find people in collapsed buildings.
10
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22