John Gribbin explains the science behind time travel in the movies and whether travelling through time is possible.
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Instant Genius: Time
Everything you need to know about time, from how it works, to whether we could time travel.
Everything you need to know about time
The arrow of time isn’t quite as simple as the second law of thermodynamics suggests.
Theories of science have ignored time... until now. This idea reveals how it created the Universe - and you, writes Robert Matthews.
The science of time and space
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Time Q&As
Our panel of experts answer every question you wanted to know about time - if you want to ask us a question, email us at or tweet us at @sciencefocusQA