Why this matters: Extra dimensions could unify physics, explain cosmic mysteries, and reshape our understanding of the universe’s structure. What scientists propose: String theory and M‑theory predict ...

Finn Wolfhard and Millie Bobby Brown in the Netflix series "Stranger Things." (Curtis Baker/Netflix) The U.S. Department of Energy has been denying the existence of experiments in exploring parallel ...

In the Marvel Comics multiverse, not all Peter Parkers are the same or even named Peter Parker. In Spider-Man: Into the Spider-Verse, the newest iteration of the radioactive-spider-fueled tale, ...