If the chemical sodium is dropped into water it will immediately and violently explode.
67
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Balsa wood is classified as a hard wood!
41
Nylon is made from coal and petroleum.
42
The average temperature at 40,000 feet above sea level is -60 F.
56
The only letter not appearing on the Periodic Table is the letter "J".
180
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Billions of neutrinos pass unnoticed through your body every second.
6