It looks like time travel, closed timelike curves, quantum mechanics, and quantum entanglement are once again at the centre ...

Physicists are investigating whether quantum mechanics enables information to travel back in time, leveraging phenomena like ...

Science is stranger than sci-fi is proven again as an idea to explain some core concepts of quantum mechanics, is leading to a theory of the future affecting the past writes Satyen K. Bordoloi. A ...

In grammar, we learn about the past, present, and future tenses from an early age. This shapes our understanding of time as a one-way arrow. Eggs break, but don’t un-break; we grow older, but never ...

Since you first started learning about the world, you’ve known that cause leads to effect. Everything that’s ever happened to or near you has reiterated this point, making it seem like a fundamental ...

If his experiment with splitting photons actually works, says University of Washington physicist John Cramer, the next step will be to test for quantum "retrocausality." That's science talk for saying ...

Does time have a direction? You’d think so. When you pour cream into coffee, it swirls around and paints your cup o’ joe a lighter brown—the cream doesn’t tend to funnel itself out of your coffee and ...

In 2022, the physics Nobel prize was awarded for experimental work showing that the quantum world must break some of our fundamental intuitions about how the universe works. Many look at those ...

The article on retrocausality seems to be implying that John Cramer and others are on the verge of sending messages back in time (30 September, p 36). They are not. Retrocausality is a conceptual ...