The only letter not appearing on the Periodic Table is the letter "J".
180
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
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
The storage capacity of human brain exceeds 4 Terrabytes.
140
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