There's a regenerative candle that creates a new candle as it melts.
20
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Nachos were actually invented by a guy named Nacho. Happy Nacho Day!
13
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39