Einstein tried to bring back the aether! Most people think Michelson-Morley (1887) ended the debate but i only ruled out a static luminiferous aether, not all models. In his 1920 Leiden lecture, Einstein argued that general relativity requires space itself to have physical properties. Something you could call an aether, just not the classical kind. Colbern takes it further: a superfluid vacuum made of sub-Planck-scale particles, roughly 10²⁰ times smaller than an atomic nucleus, that only exerts force on accelerating matter. The drag it creates? That may be what we experience as inertia. And you can derive F=ma directly from it. What if Newton's second law isn't fundamental but emergent from the structure of "empty" space? Episode with Steve Colbern coming today 2EST. Out now for members.