› added 7 years ago

181

TIL camels were originally adapted to the arctic, not the desert.

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QNG96 TIL that Rainbows are affected by polarization.
XrMj TIL the Allied operation to conceal the D-Day Invasion involved fake radio traffic, double agents, an Australian actor, and fake invasion plans for Calais, Norway, the Mediterranean, and the Balkans. It was so effective Hitler believed the real invasion hadn’t begun until seven weeks after D-Day.
wLx97 TIL that the "sweet spot" altitude for airplanes is between 35000 and 42000 feet - At higher altitude the air is too sparse for the engines while lower altitude means higher resistance
x6E6w TIL that the story of NASA spending millions on a space pen is a lie.The pen was invented by a man called Paul Fisher who sold it to NASA for $6 a pen.
rR4BW TIL the first living creature to orbit the earth was Laika, a stray Russian dog. Russian scientists figured a stray dog already learned to endure harsh conditions of cold temperature and hunger making it an ideal astronaut.