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
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Pure water (H2O) does not conduct electricity on its own.
46
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Nearly 50% of the world's scientists are assigned to military projects.
71
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118