A polar stratospheric cloud (PSC) is a cloud that forms in the winter polar stratosphere at altitudes from 15,000 to 25,000 m. They are best observed during civil twilight, when the Sun is between 1° and 6° below the horizon, as well as in winter and in more northerly latitudes. One main type of PSC is composed of mostly supercooled droplets of water and nitric acid and is implicated in the formation of ozone holes. The other main type consists only of ice crystals, which are not harmful. This type of PSC is also called nacreous, due to its iridescence.
"}{"fact":"A cat has more bones than a human being; humans have 206 and the cat has 230 bones.","length":83}
{"slip": { "id": 118, "advice": "A common regret in life is wishing one had the courage to be ones true self."}}
{"type":"standard","title":"Ladderback chair","displaytitle":"Ladderback chair","namespace":{"id":0,"text":""},"wikibase_item":"Q18169238","titles":{"canonical":"Ladderback_chair","normalized":"Ladderback chair","display":"Ladderback chair"},"pageid":43890798,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Ladderback_Chair.jpg/330px-Ladderback_Chair.jpg","width":320,"height":569},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/b/b6/Ladderback_Chair.jpg","width":1080,"height":1920},"lang":"en","dir":"ltr","revision":"1216194547","tid":"33619b35-edf1-11ee-a25b-1a10cf2d41be","timestamp":"2024-03-29T17:24:30Z","description":"Chair backed with spindles or slats","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Ladderback_chair","revisions":"https://en.wikipedia.org/wiki/Ladderback_chair?action=history","edit":"https://en.wikipedia.org/wiki/Ladderback_chair?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Ladderback_chair"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Ladderback_chair","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Ladderback_chair","edit":"https://en.m.wikipedia.org/wiki/Ladderback_chair?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Ladderback_chair"}},"extract":"A ladderback chair, also ladder-back chair, slatback chair or fiddle back although that name is used less now due to the creation of the fiddle back chair. It gets its name from the horizontal spindles that serve as the back support on them and are reminiscent of a ladder.","extract_html":"
A ladderback chair, also ladder-back chair, slatback chair or fiddle back although that name is used less now due to the creation of the fiddle back chair. It gets its name from the horizontal spindles that serve as the back support on them and are reminiscent of a ladder.
"}{"slip": { "id": 175, "advice": "Plant a tree."}}
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{"slip": { "id": 168, "advice": "Do a bit more for your friends."}}
{"fact":"Like birds, cats have a homing ability that uses its biological clock, the angle of the sun, and the Earth's magnetic field. A cat taken far from its home can return to it. But if a cat's owners move far from its home, the cat can't find them.","length":243}
{"slip": { "id": 13, "advice": "If you're feeling tired or anxious, a pint of water will almost always make you feel better."}}