One cubic foot of gold weighs more than 1,200 pounds!
78
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Aluminum used to be more valuable than gold!
84
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Iron weighs more after it rusts.
68
The sun is 330,330 times larger than the earth.
75