02/21/2012 12:48 pm ET Updated Apr 22, 2012

It's Not Too Late To Become A Yoga Believer

After reading my colleague William J. Broad's new book, "The Science of Yoga," and observing a class at my local Y, I see there may be a lot more to this centuries-old activity, more to its benefits and its risks, than I had ever imagined.

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