The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
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
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A cubic yard of air weighs about 2 pounds at sea level.
31
Nylon is made from coal and petroleum.
42