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Cake day: June 10th, 2023

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  • Leeches are such cool creatures. I had a run-in with them while canoeing in Manitoba. Just one or two latched on. It’s really incredible how they can move their bodies around in the water yet maintain the exact texture and fluidity of the water itself. You’d never be able to feel one if it brushed up against you.

    Also crazy how well whatever numbing chemical they produce works.

    If you want to safely observe one up close, you can get them to latch on to your finger nail where they can’t do any damage.



  • ch00f@lemmy.worldtoMicroblog Memes@lemmy.worldThe moon
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    4 days ago

    Best explanation I’ve seen is that humans judge distance and size assuming a relatively flat surface (a dozen miles or so in any direction is fairly flat even though the Earth is round).

    Things far along the horizon tend to be small because they’re far away. This isn’t the case for the Moon. So our brains assume it’s far away, but it’s the same apparent size, ergo, it must be massive.

    Like we know Mt Rainier is massive and far away, so given this photo, we might assume the moon is massive.

    Higher in the sky, there’s no real point of reference. Also, you might visually process the sky as a flat layer above the ground, so the same parallax trick applies. I.e. the sky above you is closer than the sky/ground at the horizon. Therefore Moon is “closer” and appears smaller.