Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Most dust particles in your house come from dead skin.
48
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
A cubic yard of air weighs about 2 pounds at sea level.
31
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101