Cold water weighs more than hot water.
93
Nylon is made from coal and petroleum.
42
Sound travels about 4 times faster in water than in air.
408
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
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
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
