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    CDG minimum age

    Recently glancing at the BCRA online archives, I saw some papers concerning the relationship between CDG and ICDG, which included minutes of a 1964 CDG meeting. What got my attention was a note that CDG required a minimum age of 21 for diving members, for insurance reasons. My first cave dive...
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    Deepest blue hole

    https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2024.1387235/full
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    Rule of thirds origin

    I always thought that the "Rule of Thirds" was developed by Sheck Exley. However, it seems that Bob Leakey might have a much earlier claim. In "The Caverns of Mossdale Scar", he wrote "I had practiced holding my breath for as long as I could counting up to 79, 80, 90 a hundred and so on. I used...
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    Cave diving to -312m

    Cave diving to -312m
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    The perils of cave tourism

    https://edition.cnn.com/2022/10/24/us/arizona-grand-canyon-caverns-tourists-trapped/index.html
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    TV fare

    I dunno what the TV fare is like in the UK these days, but it must be getting close to rock bottom here in the USA. The ?Travel Channel?, ?Discovery Channel?, ?History Channel?, and even the ?Science Channel? are full of pseudoscience, ancient (and modern) aliens, and paranormal reality-show...
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    Mendip cave anagrams

    Here's a few Mendip cave anagrams to occupy idle moments. All can be found in MU. 1. do sport 2. eldest nuns vast claw 3. follow altered pups 4. how eye look 5. hurl on these 6. noble shower 7. nude shark lord 8. rail vehicles 9. see vile horror 10. so called twist 11. swarm at men or fall 12...
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    Montreal glacial caves?

    Does this sound credible?  Fissures opened with matching walls, yet a flat roof? https://news.nationalgeographic.com/2017/12/cave-discovery-montreal-st-leonard-ice-age-spd/
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    padlockery

    https://www.cbsnews.com/news/lukas-cavar-indiana-university-student-locked-in-cave-feels-lucky-to-be-alive/
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