quantum mechanics

Are there parallel universes? Universes in which, rather than reading this article, you are still asleep; in which you are happier, unhappier, richer, poorer, or even dead? The answer is "possibly". It's a controversial claim but one that has won more and more followers over the last few decades.

Everyone knows what time is. We can practically feel it ticking away, marching on in the same direction with horrifying regularity. Time has enslaved the Western world and become our most precious commodity. Turn it over to the physicists however, and it begins to morph, twist and even crumble away. So what is time exactly?

This podcast featuring Paul Davies, a theoretical physicist and cosmologist at Arizona State University and Director of BEYOND: Centre for Fundamental Concepts in Science, explores this difficult question and accompanies our What is time article.

Some general ideas in very few words and without equations.

Why did physicists at the beginning of the 20th century feel they needed a new — and strange — theory?

Here's a quick introduction to the most famous cat in the history of science. We hope it whets your appetite for quantum mechanics!

A very strange way of explaining away the strangeness of quantum mechanics.

To mark national cat day, here's a quick look at the most famous cat in the history of science: Schrödinger's cat.

At the heart of modern physics lurks a terrible puzzle: the two main theories that describe the world we live in just won't fit together.

A closer look at one of the simplest quantum algorithms.

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