In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Diamonds can be shattered with a hammer.
-104
Nearly 50% of the world's scientists are assigned to military projects.
71
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A single speck of dust is half way in size between a subatomic particle and the Earth.
15