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
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
For every gallon of sea water, you get more than a quarter pound of salt.
45
No matter how cold it gets, gasoline will not freeze.
107