Time Travel for Beginners – Mary & John Gribbin ****

Although this is a children’s (or more accurately young adults’) book, it works reasonably well for adults too who want a basic overview of the science of time travel. It clearly is aimed at the teen market – it has biggish print, large line spacing and some rather gratuitous illustrations – but it also provides a very effective introduction to the basic physics of time travel.

After a quick introduction to relativity and quantum theory – the basics for any time travel device, the Gribbins plunge into time machines that work by dragging space-time, and time machines based on wormholes. I’m not sure they get wormholes quite right – the wormhole described here is bi-directional, implying it’s a pair of black holes rather than a black hole and a white hole, so it’s not quite obvious how you ever get out of it. But that apart, the basics are fine.

Most young readers will find it fascinating that time machines are not physically impossible, just very, very difficult to build, and the book should do well if the right people get hold of it. My only worry there is that to be old enough to understand this book, you probably will be able to read adult popular science. And if you are reading adult popular science, you probably won’t want a book from ‘Hodder Children’s Books’ that looks like a kid’s book, even though the text is, as mentioned, entirely suitable for a beginner adult.

I also found the last section, which woffles on about sum over histories for time travel a little confusing, as if the authors felt they had to include it, but weren’t sure quite what to do with it.

Overall, though, an effective introduction to the science of time travel.

Paperback:

Using these links earns us commission at no cost to you

Review by Brian Clegg

Comments

Roger Highfield - Stephen Hawking: genius at work interview

Roger Highfield OBE is the Science Director of the Science Museum Group. Roger has visiting professorships at the Department of Chemistry, UCL, and at the Dunn School, University of Oxford, is a Fellow of the Academy of Medical Sciences, and a member of the Medical Research Council and Longitude Committee. He has written or co-authored ten popular science books, including two bestsellers. His latest title is Stephen Hawking: genius at work . Why science? There are three answers to this question, depending on context: Apollo; Prime Minister Margaret Thatcher, along with the world’s worst nuclear accident at Chernobyl; and, finally, Nullius in verba . Growing up I enjoyed the sciencey side of TV programmes like Thunderbirds and The Avengers but became completely besotted when, in short trousers, I gazed up at the moon knowing that two astronauts had paid it a visit. As the Apollo programme unfolded, I became utterly obsessed. Today, more than half a century later, the moon landings are

Space Oddities - Harry Cliff *****

In this delightfully readable book, Harry Cliff takes us into the anomalies that are starting to make areas of physics seems to be nearing a paradigm shift, just as occurred in the past with relativity and quantum theory. We start with, we are introduced to some past anomalies linked to changes in viewpoint, such as the precession of Mercury (explained by general relativity, though originally blamed on an undiscovered planet near the Sun), and then move on to a few examples of apparent discoveries being wrong: the BICEP2 evidence for inflation (where the result was caused by dust, not the polarisation being studied), the disappearance of an interesting blip in LHC results, and an apparent mistake in the manipulation of numbers that resulted in alleged discovery of dark matter particles. These are used to explain how statistics plays a part, and the significance of sigmas . We go on to explore a range of anomalies in particle physics and cosmology that may indicate either a breakdown i

Splinters of Infinity - Mark Wolverton ****

Many of us who read popular science regularly will be aware of the 'great debate' between American astronomers Harlow Shapley and Heber Curtis in 1920 over whether the universe was a single galaxy or many. Less familiar is the clash in the 1930s between American Nobel Prize winners Robert Millikan and Arthur Compton over the nature of cosmic rays. This not a book about the nature of cosmic rays as we now understand them, but rather explores this confrontation between heavyweight scientists. Millikan was the first in the fray, and often wrongly named in the press as discoverer of cosmic rays. He believed that this high energy radiation from above was made up of photons that ionised atoms in the atmosphere. One of the reasons he was determined that they should be photons was that this fitted with his thesis that the universe was in a constant state of creation: these photons, he thought, were produced in the birth of new atoms. This view seems to have been primarily driven by re

Search This Blog