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It's crazy that a 60 ton metal airplane can just fly
(lemmy.world)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
Submarines work by manipulating their density, don't they? Then they just float at whatever level matches their density.
Yeah, they're more like dirigibles than airplanes. But same as airplanes, people have had a hard time believing that something made of metal can float.