A single speck of dust is half way in size between a subatomic particle and the Earth.
15
A ball of glass will bounce higher than a ball made of rubber.
73
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sound travels about 4 times faster in water than in air.
408
In zero gravity, a candle's flame is round and blue.
16
Iron weighs more after it rusts.
68
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18