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TIL A constant runny nose with a sweet rather than salty taste is likely to be cerebro-spinal fluid, not mucus.

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doQQ TIL In the 13th century there was a Russian boy named Onfim whose child drawings preserved up to today.
9wYb6 TIL Smoke following people around a fire is due to hot air rising from the fire and drawing cold air towards it. A person would block cold air from flowing in that particular location, causing the hot air, along with the smoke, to seemingly follow the person.
M7AXa TIL about Lake Vostok, an Antarctic subglacial lake kept liquid at -3 degrees Celsius due to the sheer pressure of the 4000 meters thick ice sheet above it. Having been isolated for around 25 million years, the lake is said to hold clues about potential extraterrestial life on the icy moon Europa
9Y6xD TIL that the Eiffel Tower was originally supposed to be in Barcelona but the city thought it would look like an eyesore so Gustave Eiffel was forced to repitch the project elsewhere.
yQoXw TIL that the measly 20W signal from Voyager 1, the equivalent of a fridge light-bulb, can be distinguished from background radiation in the sky almost instantly, despite being 11 billion miles away