For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels about 4 times faster in water than in air.
408
Cold water weighs more than hot water.
93
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Sound travels fifteen times faster through steel than through air.
134
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Most dust particles in your house are made from dead skin!
67