The smell of freshly cut grass is actually a plant distress call.
31
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
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
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Each day, up to 150 species of life become extinct.
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