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
Billions of neutrinos pass unnoticed through your body every second.
6
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
A cubic yard of air weighs about 2 pounds at sea level.
31