Iron weighs more after it rusts.
68
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The only letter not appearing on the Periodic Table is the letter "J".
180
All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
51
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75