time travel

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.

Is time travel allowed?

We're all on a journey into the future, but can we travel into the past? Find out with Kip Thorne

Time to get packing?

Mathematicians give green light for time machine

A new time machine

Take a journey to the limits of common sense

Happy Birthday Stephen Hawking!

This issue of Plus is a special, marking the occasion of Stephen Hawking's 60th birthday. Plus attended his Birthday Conference in Cambridge, where we interviewed some of the world's most influential mathematicians and physicists.

Maths in a minute

Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.

The mathematical shapes in your brain

Join us as we follow Kathryn Hess on a mathematical mystery tour of the marvellous intricacy of the brain!
Maths in a minute: The positive predictive value

When you receive a positive test result for a disease, the chance you actually have it depends on how common the disease is.
Maths in a minute: The prime number theorem

A quick look at one of the most important theorems in number theory.
The shower equation: Dealing with delay

Many processes, including climate change and the spread of COVID-19, involve a delay. Here's a beautiful equation designed to model such processes.
Will the virus escape the vaccines?

Can the virus that causes COVID-19 mutate into a vaccine-resistant strain? And if yes, what would this mean for our vaccination strategy?

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