Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Hot water can freeze faster than cold water.
181
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
German chemists made a replica of a trophy the size of one molecule.
68
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A ball of glass will bounce higher than a ball made of rubber.
73
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39