In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Sound travels about 4 times faster in water than in air.
408
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
The average temperature at 40,000 feet above sea level is -60 F.
56
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
12