Here are four types of theories from modern physics that look a bit like the alternate worlds that are a staple of science fiction, with explanations of how they work and why you can't visit any ...

The original Ultimate Universe was exciting for Marvel Comics, introducing new versions of Spider-Man, the Fantastic Four, the X-Men and more, all while Marvel continued to publish their classic ...

In an alternate universe, there’s a 600-mph underground missile train between NYC and Philly In an alternate reality, this pyramid is the Lincoln Memorial See Also: San Francisco’s crime rate ...

Calling on someone’s memory in this way may not unlock an alternate universe—but it does suggest that the past is not entirely gone. Nico Krijno The Allure of Living a Radically Different Life ...

The Universe is currently flat or nearly flat, according to Marius Sparn, a PhD student at Kirchhoff-Institut für Physik. But at the beginning of its existence, it might have been more positively ...