Cold water weighs more than hot water.
93
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Sound travels about 4 times faster in water than in air.
408
One cubic foot of gold weighs more than 1,200 pounds!
78
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21