Cold water weighs more than hot water.
93
Iron weighs more after it rusts.
16
If the chemical sodium is dropped into water it will immediately and violently explode.
67
4.5 pounds of sunlight strike the Earth each day.
27
A ball of glass will bounce higher than a ball made of rubber.
73
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Neanderthal man had a brain capacity 100cc larger than modern man's.
50