› added 7 years ago

215

TIL steam is an invisible gas. If you can see it, it’s not steam, it is condensation.

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WkJEL TIL that the adult mayfly lives less than 24 hours. Its sole purpose is to find partners and mate before it dies. The adults of many mayfly species don't even have mouths and digestive systems, because they don't live long enough to need them.
n5XW TIL Tadeusz Kosciuszko, a Polish war hero who helped win the American Revolutionary War, left his property in the USA to be sold to educate and free Thomas Jefferson’s and other slaves. As executor, Jefferson never acted on the will and no slaves were freed.
Gy55 TIL: smoking a pack a day in New York state costs almost $450 a month or $5300 a year.
VBg54 TIL: we only ever see one side of the moon due to synchronous rotation
oRYWW TIL about the Axis of evil in Cosmology. It’s the correlation between the plane of the Solar System and aspects of the cosmic microwave background (CMB) and gives the plane of the Solar System and hence the location of Earth a greater significance than is expected by chance.