Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
A ball of glass will bounce higher than a ball made of rubber.
73
One 75-watt bulb gives more light than three 25-watt bulbs.
57
One barrel of petroleum holds 42 gallons.
20
No matter how cold it gets, gasoline will not freeze.
107
Sound travels about 4 times faster in water than in air.
408