4.5 pounds of sunlight strike the Earth each day.
27
The smell of freshly cut grass is actually a plant distress call.
31
The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
5
Balsa wood is classified as a hard wood!
41
Pure water (H2O) does not conduct electricity on its own.
46
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
Diamonds can be shattered with a hammer.
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Nearly 50% of the world's scientists are assigned to military projects.
71