Diamonds can be shattered with a hammer.
-104
Sound travels fifteen times faster through steel than through air.
134
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
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
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Balsa wood is classified as a hard wood!
41
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Your brain is 80% water.
525