The average temperature at 40,000 feet above sea level is -60 F.
56
Nylon is made from coal and petroleum.
42
The bark of an older redwood tree is fireproof.
65
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Aluminum used to be more valuable than gold!
84
The Manchineel Tree is so poisonous, rainwater dripping off it’s leaves will burn your skin.
17
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One cubic foot of gold weighs more than 1,200 pounds!
78