One 75-watt bulb gives more light than three 25-watt bulbs.
57
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Most dust particles in your house are made from dead skin!
67
Pumice is the only rock that floats on water.
14
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Each day, up to 150 species of life become extinct.
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