Our universe does host life, but another one might be even better suited for life. Here’s what you’ll learn when you read this story: Researchers are studying how hospitable our universe is to ...

What if there are other universes, just like ours? With an infinite number of Earths? With uncountable versions of you? And what if we don’t have to look too far to find them? Maybe a mirror version ...

In the season 2 episode “Mirror, Mirror,” Star Trek perfected the alternate universe trope long before Hollywood became obsessed with the unlimited franchise-expanding potential of a multiverse.