Since my book, **Paradox: The Nine Greatest Enigmas in Science**, came out a couple of weeks ago, there have been a number of reviews, which have been overwhelmingly positive about it. Here is a selection of quotes:

**‘The wizardry of Jim Al-Khalili is irresistible. Marvel at the mind-bending Zeno’s paradox! The amazing ambiguity of Schrödinger’s Cat! The preposterous postulations of perpetual motion! The extraterrestrial extrapolations of Fermi’s paradox! and other wonders of physics, philosophy, even poetry. “I have had tremendous fun writing this book,” says Professor Jim. Reading it is the best fun you can have beyond a pop-science comic book and a home particle accelerator.’ ***Times*

‘A master of making the complex simple. ’ *Independent on Sunday*

** **

* *‘Al-Khalili leads into the harder science, but does so with such deceptive ease that before you know it you’re mulling over the expanding universe, staring down quantum theory and pondering Schrödinger’s Cat – and enjoying it.’ *Financial Times*

** **

* *‘Al-Khalili is the ideal guide through these seeming mysteries of modern science.’ *New Scientist*

And here are some in more detail.

In E&T Magazine

By the journalist Iain Finlayson that appeared in the *Times*.

In the Financial Times

In New Scientist

## About Jim Al-Khalili

Professor of theoretical physics at the University of Surrey, author and broadcaster.

Slight typo in the title of the book. “… The *Nice* Greatests Enigmas …”

thank you. Will edit.

Hello

I have no problem what-so-ever with the Monty Hall Paradox. But I’m not at all happy with what is written about the two boy/girl cats! It seemes to me that:

If one is stated to be a boy, then it’s a sure thing that you are going to get one boy cat, that takes it out of the equation and it matters no which one it is.

So you are left with one other cat and the chance of it being a boy 1/2 (50%)

Since it’s a sure thing (100%) that the other one is a boy, it follows that your chance of getting two boys musy be 1/2 (50%) and it’s as simple as that, their colour doesn’t come into it – or please tell me where I’m going wrong?

Rod

Hello,

When will the book translated in German?

BR, Via

I agree with Rod about the cats. I can explain it in two ways:

1. You have 2 columns labeled “black” and “tabby”. Couldn’t you label the columns “the cat he checked” and “the cat he didn’t check” and get the same answer?

2. Or to look in terms of the explanation you made that you eliminate the 4th row. Of the 3 remaining cases, the first one where both of the cats are male was actually more likely to result in a male cat being observed, so that case should weighted twice as heavily as the others. It’s exactly the same situation as the puzzle with the coins in the boxes that you described earlier in the chapter.