Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Cold water weighs more than hot water.
93
Nylon is made from coal and petroleum.
42
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Scientists are now able to grow 'beating' heart tissue in a lab!
162