Dryfire

joined 1 month ago
sorted by: new top controversial old
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 in c/[email protected]
[–] [email protected] 14 points 1 day ago (1 children)

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.