In zero gravity, a candle's flame is round and blue.
16
One cubic foot of gold weighs more than 1,200 pounds!
78
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Research indicates that plants grow healthier when they are stroked.
173
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Sound travels about 4 times faster in water than in air.
408
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15