Scientists aren't sure what color dinosaurs were.
312
A cesium atom in an atomic clock beats over nine billion times a second.
43
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
Iron weighs more after it rusts.
68
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Your brain is 80% water.
525