You might start here: http://en.wikipedia.org/wiki/Tummo#Scientific_investigation http://en.wikipedia.org/wiki/Tummo#Scientific_investigation If you're intere

You might start here: http://en.wikipedia.org/wiki/Tummo#Scientific_investigation http://en.wikipedia.org/wiki/Tummo#Scientific_investigation If you're interested in how to perform the actual meditation, this is a great book: http://www.amazon.com/Bliss-Inner-Fire-Practice-Naropa/dp/086171136X http://www.amazon.com/Bliss-Inner-Fire-Practice-Naropa/dp/08...