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
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Aluminum used to be more valuable than gold!
84
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
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
The force of a suction cup is calculated using F=AP.
15
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Pumice is the only rock that floats on water.
14