Stranger Things 5 introduced the idea of using a wormhole to time travel. Here's why that could lead to a Back to the Future ...

"Stranger Things" Season 5 ending might have been teased by the unlikely AV Teacher Mr. Clarke in the early episodes of the final season.

Our curiosity about time travel is thousands of years old. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Time travel makes regular appearances ...

Testing times A toy model from Marco Pettini seeks to reconcile quantum entanglement with Einstein’s theory of relativity. (Courtesy: Shutterstock/Eugene Ivanov) Nonlocal correlations that define ...