Baldur's Gayte by Dryfire in c/science_memes@mander.xyz

[-] Dryfire@lemm.ee 2 points 2 days ago

The real issue is "Hole" is not desctiptive enough for a clear answer. A straw has one "Through Hole". If you dig a hole in the ground you have one "Blind Hole".

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A German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Meters by Dryfire in c/science@lemmy.world

[-] Dryfire@lemm.ee 15 points 1 month ago

There are 2000 year old Roman concrete piers that are still just hanging out in sea water. So it's possible if you find the right mix.

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Dryfire

joined 2 months ago