Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Pumice is the only rock that floats on water.
14
Sound travels about 4 times faster in water than in air.
408
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
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Balsa wood is classified as a hard wood!
41