You mean the ones with a DeLorean or whatever? Those are powered closed-loop-con...

		taneq on Aug 6, 2023 \| parent \| context \| favorite \| on: Successful room temperature ambient-pressure magne... You mean the ones with a DeLorean or whatever? Those are powered closed-loop-control devices. Or the spinning tops (Levitron etc.?) Those are dynamic and fall down when they stop spinning.