The idea of a multiverse was once in vogue, but now it's less so. Even if there are other universes who resemble ourselves, they're not us. You might feel happy or sad for the ones in the other universes,. But don't feel responsible for them. They don't know you and I yet.
The film Everything Everywhere All at Once has enjoyed critical acclaim and awards success. Ahead of the Oscars, where it’s tipped to sweep the board, Ian Sample speaks to theoretical physicist and philosopher Sean Carroll about why we seem to be drawn to the idea of multiple worlds, and what the science says about how the multiverse might actually work. Help support our independent journalism at
theguardian.com/sciencepod