The bark of an older redwood tree is fireproof.
65
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Billions of neutrinos pass unnoticed through your body every second.
6
Pumice is the only rock that floats on water.
14
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5