Scientists in Germany have developed a candy that doesn't cause cavities.
11
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
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
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Sound travels about 4 times faster in water than in air.
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