In zero gravity, a candle's flame is round and blue.
16
Nylon is made from coal and petroleum.
42
Each day, up to 150 species of life become extinct.
-23
Most dust particles in your house are made from dead skin!
67
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
The average temperature at 40,000 feet above sea level is -60 F.
56
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Sound travels about 4 times faster in water than in air.
408