The average temperature at 40,000 feet above sea level is -60 F.
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In zero gravity, a candle's flame is round and blue.
16
Iron weighs more after it rusts.
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Most dust particles in your house are made from dead skin!
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Scientists are working on a portable spray-on-skin that can heal severe wounds in just a few minutes.The spray mainly contains important proteins that can reprogram the injured cells to become stem cells, and back to young uniformed skin cells. So far they were able to accelerate healing process from 12 weeks to 21 days with a similar approach.
16
One cubic foot of gold weighs more than 1,200 pounds!
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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
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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