A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One cubic foot of gold weighs more than 1,200 pounds!
78
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Sound travels about 4 times faster in water than in air.
408
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5