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Pathetic (lemmy.world)
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Erosion is largely done by sediment being transported by the water I believe. The same principle is used in cutting water jets, it isnt the water pressure that cuts things, the water is a medium for abrasive materials

[-] Leonixster 34 points 1 day ago

This is also how they cut rocks in ancient egypt I believe? Not with water, mind you, but would use a pretty mediocre if not useless saw but would drop sand in there, so it was actually the sand cutting the rock

[-] surewhynotlem@lemmy.world 19 points 21 hours ago

This is also how they cut rocks in ancient egypt

I'm tired of this human-centric revisionist history. It completely devalues the contributions of hard working aliens.

[-] Leonixster 2 points 15 hours ago

Who do you think taught the humans

[-] Passerby6497@lemmy.world 4 points 21 hours ago

Yep! Thought Emporium posted a video where he showed off the techniques that humans could have used if the aliens never returned their calls.

Yep! The would use a saw that often had a blade made of string, like a bow, but would but gritty, sandy water in the hole they were cutting to slowly grind it away. I think they would also use “dull” copper saws (don’t quote me on that one though)

[-] jaybone@lemmy.zip 5 points 1 day ago

Wouldn’t the string break from the abrasive sand long before it made an impact on the stone they were trying to cut?

[-] HerbGrower@slrpnk.net 15 points 1 day ago

Change the string as it wears out. As long as it makes enough progress to justify the cost of the string it would be a decent choice.

[-] bricked@feddit.org 1 points 15 hours ago

So.. why don't those abrasive materials destroy the hair in the drain?? Explain yourself

[-] anton 5 points 14 hours ago

Because you don't flush enough sand down your shower drain.

[-] unemployedclaquer@sopuli.xyz 1 points 1 day ago* (last edited 1 day ago)

As my compatriot elucidated, when we were wee morons of damn near adult age, "I could keep stabbing this pole with this piece of metal, and after many eons of stabbing, this pole would come down!"

I may just hallucinated . actually that young man graduated and went on.

this post was submitted on 16 Aug 2026
640 points (100.0% liked)

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