A fun and fascinating look at great scientific paradoxes.Throughout history, scientists have come up with theories and ideas that just don't seem to make sense.  These we call paradoxes.  The paradoxes Al-Khalili offers are drawn chiefly from physics and astronomy and represent those that have stumped some of the finest minds.  For example, how can a cat be both dead and alive at the same time?  Why will Achilles never beat a tortoise in a race, no matter how fast he runs?  And how can a person be ten years older than his twin?With elegant explanations that bring the reader inside the mind of those who've developed them, Al-Khalili helps us to see that, in fact, paradoxes can be solved if seen from the right angle.  Just as surely as Al-Khalili narrates the enduring fascination of these classic paradoxes, he reveals their underlying logic.  In doing so, he brings to life a select group of the most exciting concepts in human knowledge.Paradoxis mind-expanding fun.From BooklistThis exploration of enigmas in physics is aimed at popular-science readers, but in places, it does require at least a working knowledge of higher math. Some of the famous paradoxes (or, rather, perceived paradoxes) that quantum physicist and university professor Al-Khalili dissects are relatively easy to grasp, such as the one that explains, despite what our brains might tell us, why you only need a group of 57 people to guarantee that at least two of them will share a birthday. But others, such as Zeno’s famous paradox of Achilles and the Tortoise (which seems to suggest that, no matter how fast Achilles runs, he can never catch up to the slower tortoise), take quite a bit of explaining and occasionally some physics history or mathematics. It’s a very interesting book with some nifty surprises: Olber’s Paradox, for example, which asks why the sky gets dark at night when there are billions of stars up there, provides proof of the Big Bang theory. Not for your average brain-teaser fan, but this volume should have definite appeal to readers with the necessary grounding in the subject. --David PittReview“Readers who enjoy mental challenges and scientific mysteries will have fun with Al-Khalili’s lighthearted, accessible discussion.” –Publisher’s Weekly*“A very interesting book with some nifty surprises.” –Booklist Online*