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!
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Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
The average home creates more pollution than does the average car.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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