this post was submitted on 30 Aug 2025
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xkcd #3135: Sea Level (imgs.xkcd.com)
submitted 10 months ago by xkcdbot@lemmy.world to c/xkcd@lemmy.world
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xkcd #3135: Sea Level

Title text:

They're up there with coral islands, lightning, and caterpillars turning into butterflies.

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3135/

explainxkcd for #3135

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[–] infinitesunrise@slrpnk.net 56 points 10 months ago* (last edited 10 months ago) (2 children)

Huh. TIL that there are three common types of tidal cycles and which one you get depends on geography, location, ocean currents. https://beltoforion.de/en/tides/tidal_cycles.php

And yeah, dinural is apparently the most rare of the three. Wild.

[–] Successful_Try543@feddit.org 8 points 10 months ago (1 children)

Thanks. I didn't know either that there are places, where the sea level does not rise and fall twice a day.

[–] MarieMarion@literature.cafe 2 points 10 months ago (1 children)

I was reading Circe, by Madeline Miller, and on several pages some ancient Greeks wait for the tide to sail away, or watch the sea rising while waiting for Odysseus, and so on. Like, woman, did nobody notice at your publishing house?

[–] Wiz@midwest.social 4 points 10 months ago

Me, too, TIL!