The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
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
Most dust particles in your house are made from dead skin!
67
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
There is a surgical implant being developed that will give you an orgasm at the touch of a button.
20
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5