It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
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
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Hot water can freeze faster than cold water.
181
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
