One of the evergreen topics in online discussions of physics is what role, if any, philosophy plays in the discipline. I've been blogging since 2002 (which is after the dinosaurs, but before the giant ...

What is happening right now? Is your “now” the same as my “now”? It seems like a simple question, that is, until you introduce relativity. You see, you and I experience time differently. For one of us ...

Le raisonnement selon lequel la simultanéité est relative du point de vue de l'observateur est fondamental dans la Relativité restreinte. Pourtant, l'analyse de ce raisonnement mène aux critiques ...