Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Out of all the senses, smell is most closely linked to memory.
146
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Pure water (H2O) does not conduct electricity on its own.
46
Pumice is the only rock that floats on water.
14
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44