superman flight superpowers physics supernatural

I've previously explored Superman's X-Ray vision and its scientific basis. Now it seems that someone has FINALLY come up with a reasonable explanation of his flight. I'm pretty sure I could breed some Supermen now given the right lab space. Postdoc here I come! Anyway, here's the abstract: Since Time immemorial, man has sought to explain the powers of Kal-El, a.k.a. Superman. Siegel et al. Supposed that His mighty strength stems from His origin on another planet whose density and as a result, gravity, was much higher than our own. Natural selection on the planet of krypton would therefore…