Theoretical physicist Carlo Rovelli thinks that “counterintuitive phenomena — for example, of time moving slower for faster travelers — will, slowly, become intuitive. ‘It has happened with the fact that the Earth is a sphere (clarified two millennia ago) and the fact that it spins (clarified a few centuries ago). At first these were extremely counterintuitive ideas; nowadays we accept them as comprehensible. But it takes time.'” – Nautilus