Balsa wood is classified as a hard wood!
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
For every gallon of sea water, you get more than a quarter pound of salt.
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13