Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Pumice is the only rock that floats on water.
14
Iron weighs more after it rusts.
68
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The bark of an older redwood tree is fireproof.
65
Out of all the senses, smell is most closely linked to memory.
146
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
