The bark of an older redwood tree is fireproof.
65
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The smell of freshly cut grass is actually a plant distress call.
31
Most dust particles in your house come from dead skin.
48
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
One cubic foot of gold weighs more than 1,200 pounds!
78