Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
One third of the electricity produced on earth is used to power electric light bulbs!
75