Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Pure water (H2O) does not conduct electricity on its own.
46
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
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
Sound at the right vibration can bore holes through a solid object.
134