Be your own laboratory

When I wrote The Universe Inside You I wanted to include a series of experiments to try out as I had done in Inflight Science. The difference was that many of these experiments were going to involve using your body as a lab, with quite a few using the brain.

It seemed the best thing to do would be to put together a website with those experiments that aren't so easy to do on the kitchen worktop, as opposed to (say) dropping antacid tablets in vinegar or extracting DNA (both in the book). And while I was at it, I could provide a more detailed 'further reading' section with links to other books, as a good few people had suggested that Inflight Science should have had suggestions for finding out more.

The outcome was www.universeinsideyou.com - I originally intended this purely as an adjunct to the book, but I've showed it to a sample of people who assure me it is quite interesting in its own right, so on their recommendation it's worth taking a look even if you don't have the book, whether you want to see someone walk on custard, experiment with optical and audio illusions, hear a piece of music that has travelled at four times the speed of sound, or interact with a piece of software that pretends to be a human being. Take a look!

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Why I hate opera

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The Internet has gone mildly bonkers over a child in America who was marked down in a test because when asked to work out 5x3 by repeated addition he/she used 5+5+5 instead of 3+3+3+3+3. Those who support the teacher say that 5x3 means 'five lots of 3' where the complainants say that 'times' is commutative (reversible) so the distinction is meaningless as 5x3 and 3x5 are indistinguishable. It's certainly true that not all mathematical operations are commutative. I think we are all comfortable that 5-3 is not the same as 3-5. However. This not true of multiplication (of numbers). And so if there is to be any distinction, it has to be in the use of English to interpret the 'x' sign. Unfortunately, even here there is no logical way of coming up with a definitive answer. I suspect most primary school teachers would expands 'times' as 'lots of' as mentioned above. So we get 5 x 3 as '5 lots of 3'. Unfortunately that only wor

Why backgammon is a better game than chess

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