Hot water can freeze faster than cold water.
181
The bark of an older redwood tree is fireproof.
65
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
Sound at the right vibration can bore holes through a solid object.
134
