Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
4.5 pounds of sunlight strike the Earth each day.
27
Optical illusions occur when what the eyes see conflicts with what the brain expects.
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One 75-watt bulb gives more light than three 25-watt bulbs.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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