Pumice is the only rock that floats on water.
14
For every gallon of sea water, you get more than a quarter pound of salt.
45
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Each day, up to 150 species of life become extinct.
-23
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Balsa wood is classified as a hard wood!
41