Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Are multiverses real? If so, what do they look ...

Pick up any science fiction book from the 1960s, and you’ll find parallel dimensions explained through magic portals or mysterious machines that work “just because.” Today’s readers want stories that ...

Can something that exists be bad science? The multiverse pops out of quite a few theories in physics, and has been proposed as a solution to certain vexing problems. But it’s also been argued that the ...