The bark of an older redwood tree is fireproof.
65
Nylon is made from coal and petroleum.
42
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The earth is approx. 6,588,000,000,000,000,000 tons.
175
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Most dust particles in your house are made from dead skin!
67