Sabine Hossenfelder is a research fellow at the Frankfurt Institute for Advanced Studies in Germany. Her research focuses on general relativity and quantum gravity. She is author of the blog ...

Editor's note: In the August issue of Scientific American, cosmologist George Ellis describes why he's skeptical about the concept of parallel universes. Here, multiverse proponents Alexander Vilenkin ...

After the monumental success of Avengers: Endgame, I remember wondering, like many people, what Marvel could possibly do to follow up such a cultural juggernaut. How could they raise the stakes or ...