this post was submitted on 26 Nov 2024
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You can consider this installment four of my previous question which is the third installment.

Throughout history, we have developed many methods of telling time. The most famous two examples being the clock and the sundial. The ancient Egyptians invented the clepsydra, an extremely simple device that uses dripping water as a way to tell how much time has passed. There are also, for example, hourglasses, which flow sand as a measurement of time.

Suppose, though, you were an intelligent dolphin and, for some reason, had to always have a time reference on you. Being under the water seems to present a challenge, for technology like clocks and hourglasses don't seem to be possible to make under the water, a clepsydra certainly wouldn't work since you can't pour water underwater, and a sundial wouldn't have the proper lighting. So you must improvise in order to find a way to keep track of time. How would you improvise in order to keep track of time.

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[–] [email protected] 35 points 1 month ago

You'll find time loses importance once you no longer have to manage it.

[–] [email protected] 15 points 1 month ago (1 children)

Mammals have to breathe, so they are surfacing from time to time… so roughly they’ll know day from night.

Tides are mostly noticeable near land.

So you have deep sea creatures away from shore. They mostly won’t care about day and night as there’s no difference, with light not penetrating more that about 200 feet.

So below 200 feet, and away from shore you mostly can’t. But also it would not matter as there’s no difference

But if you were a human, in a submarine or a diving vessel where you needed to know, a clock or radio… would be about the options

[–] [email protected] 8 points 1 month ago (2 children)

Not all care, but it still impacts them.

Rhythms at the bottom of the deep sea: Cyclic current flow changes and melatonin patterns in two species of demersal fish

Beyond this, the diurnal cycle does filter down into the disphotic zone and does influence species. It does weaken with depth.

[–] [email protected] 2 points 1 month ago

This sounds like a good way to keep track of time.

[–] [email protected] 1 points 1 month ago* (last edited 1 month ago)

Oh hell yeah!

Neat thank you!!

And I learned a new word

Zeitgebers are external cues, such as light, that synchronize the circadian clock in organisms with the Earth's day-night cycles.

[–] [email protected] 9 points 1 month ago* (last edited 1 month ago)

A reverse clepsydra: an air-filled container that releases bubbles at a constant rate.

[–] [email protected] 8 points 1 month ago* (last edited 1 month ago)

If I were an Intelligent sea creature I would just use my waterproof watch but idk about others

[–] [email protected] 8 points 1 month ago

For simplicity, I'd ask the closest crab wearing a watch. Otherwise, I'd watch the tide bubbles and see if they are traveling east or west.

[–] [email protected] 4 points 1 month ago
[–] TheOSINTguy 4 points 1 month ago

Shadows can still cast underwater, so you could use a rock as a sundial or just how light it is at a certain depth.

[–] [email protected] 3 points 1 month ago

How many up downs of my flip flop.

[–] neidu3 -1 points 1 month ago (1 children)

Wtf would I care? It's not Like I'm gonna have have office hours. Hungry? Dinner time!

[–] [email protected] 0 points 1 month ago