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Pyrocumulus clouds tower tall above a wildfire in these photos taken last week from an Oregon National Guard F-15C.

Most cumulus clouds form when the sun-warmed surface heats air, causing it to rise and carry moisture upward where it condenses to form clouds. In pyrocumulus clouds, the driving heat is supplied by a forest fire or volcanic eruption. The hot, rising air carries smoke and soot particles upward, where they become nucleation sites for condensation. Pyrocumulus clouds can be especially turbulent, and the gusting winds they produce can exacerbate wildfires. In some cases, the clouds can even develop into a pyrocumulonimbus thunderstorm with rain and lightning.

XEQlP TIL when Sean Lennon, the son of John, was little, he didn't know about The Beatles because his parents never played Beatles records at home. When Sean saw Yellow Submarine at his friend's house, his dad had to explain why there was a cartoon version of him in the movie.
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VV0B TIL “Bows eventually replaced spear-throwers as the predominant means for launching sharp projectiles on all continents except Australia.”
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YpwJG TIL of the Canal of the Pharaohs. A canal that linked the Red Sea to the Mediterranean 2,000 years before the Suez was built.