Brass doorknobs automatically disinfect themselves in about 8 hours.
18
One third of the electricity produced on earth is used to power electric light bulbs!
75
Pure water (H2O) does not conduct electricity on its own.
46
4.5 pounds of sunlight strike the Earth each day.
27
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The average temperature at 40,000 feet above sea level is -60 F.
56
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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