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Cake day: March 12th, 2024

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  • RatBin@lemmy.worldtoScience Memes@mander.xyzaliens.
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    3 months ago

    Whoever made the Milk Hill formation: you’re an artist like few other. If we treat these crop circles as land art, this is one of my favourite of all times. Do not hide if you do this - except from the farmers whose harvest you ruin, maybe - it’s…technically difficult.








  • RatBin@lemmy.worldtoScience Memes@mander.xyzbioluminescence
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    3 months ago

    The safest variant are tritium capsules, that contain a small amount of tritium of various colours, within a robust glass capsule. Tritium is one of those mildly radioactive compounds that can only emit up to alpha and beta rays, which are conveniently limited by the glass container. Radium emits a small amount of gamma rays, those can pierce through glass and iron. Now, phosphorus is the element that gave the name to the phosphorescence phoenomenon, so it is a relatively safe light-sensible coating that can have a small glow in the dark according to how much light it absorbed before, but in large amounts it isn’t good. Marco lodola used neon astethics to make these sulptures that are basically made of light in a dark room:

    https://www.bing.com/images/search?q=marco+lodola&form=HDRSC3&first=1 I’ve seen some of these firsthand, they’re amazing, and rather large.


  • RatBin@lemmy.worldtoScience Memes@mander.xyzbioluminescence
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    3 months ago

    It’s fairly easy to find radium dials up to these days. You can spot them based on the yellowish and crumbling look of the paint or once luminous compounds. They may not be glowing any longer but they retain their radioactivity. By contrast, tye greenish white paint on dials is usually tritium.


  • RatBin@lemmy.worldtoScience Memes@mander.xyzbioluminescence
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    3 months ago

    They had a whole sets of beauty products based on radium in the 20’s of the past century. They had several peculiarities such as natural luminescence and a unique pale white colour that used to shine in the darkness. I needn’t to say that this was obviously one of the most dangerous and damaging things you could apply to your body. tho-radia was a body lotion and a brand that took pride in using radium in many ways, including a product for teeth. Radioactive teeth, imagine that. I hope you don’t come across one of those old bottles in an antique shop, as they are still dangerous.