Sound travels about 4 times faster in water than in air.
408
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The average temperature at 40,000 feet above sea level is -60 F.
56
Each day, up to 150 species of life become extinct.
-23
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Scientists in Germany have developed a candy that doesn't cause cavities.
11
The bark of an older redwood tree is fireproof.
65
For every gallon of sea water, you get more than a quarter pound of salt.
45