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 real numbers and Cauchy sequences

We take the real numbers for granted, but what are they really?
Clocking the schedule

The way many football leagues schedule their fixtures can lead to unfair effects — and unsolved maths problems!
Who's watching: The limits of observation

Physics is all about observation, but how much can we actually see?
Who's watching: Can maths exist if you can't see it?

We explore non-constructive proofs and what happens if you try and avoid them.
Something from nothing?

If you can prove that a statement can't possibly be false, does this mean it's true?

Tweets by @plusmathsorg