this post was submitted on 11 May 2025
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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 (farmingdale-observer.com)
submitted 8 months ago by Dadifer@lemmy.world to c/science@lemmy.world
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[–] lagoon8622@sh.itjust.works 5 points 8 months ago

Says on the wiki 2.7 meters thick