Déjà vu occurs when your brain tries to apply a memory of a past situation to your current one, fails, and makes you feel like it's happened.
12
All the gold ever mined could be molded into a cube 60 feet high and 60 feet wide.
38
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The WD in WD-40 stands for Water Displacer.
30
A portion of the water you drink has already been drunk by someone else, maybe several times over.
170
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
24
A typical lead pencil can draw a line that is 35 miles long.
158
Music is as addictive to the brain as sex and drugs.
27