Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Hot water can freeze faster than cold water.
182
One cubic foot of gold weighs more than 1,200 pounds!
78
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79