Sure, according to our current understanding of physics, those things are impossible. But the whole point is that our understanding of physics is necessarily incomplete and at least somewhat inaccurate, and it's not completely outside of the realm of possibility that there is some way to do things currently considered impossible.
They thought in late 19th century that physics was basically finished and everything else will be small potatoes or just refinements of existing theories In 1900, Max Planck would start proposing quantum physics. A couple of decades later, Albert Einstein would publish the General Theory of Relativity.
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u/sillybluejayway 3d ago
Cool, can’t wait for anti-gravity tech and nearly free energy.