Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
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
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
According to studies, men change their minds two to three times more often than women.
72
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Scientists aren't sure what color dinosaurs were.
312
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101