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Did You Know?

The long smoky trails you see behind airplanes passing overhead are not actually smoke, but composed primarily of water (with a few minor impurities)–at high altitudes, the water vapor byproduct of the jet fuel combustion quickly crystallizes into millions of tiny ice crystals.

Did You Know?

If we ever colonize Mars, don’t expect to be phoning home for the holidays–even if you used a communication method that traveled at the speed of light, the one-way communication delay would range from about 3 to 22 minutes depending on how far Mars is from Earth at any given time.

Did You Know?

There are many countries in Central Asia with names that end in -stan, like Pakistan, Afghanistan, Kazakhstan, and others, all thanks to the Persians–the Persian root -istan means land, so the places they visited became “Land of the Kazakhs” and so on.

Did You Know?

While most people are familiar with orange marmalade, the fruit-preserve with the peel left in, marmalade can be made with any citrus fruit like lemons, limes, and grapefruits.

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