Ya know I read that too and just thought....hmmmmmm....maybe they are wrong....as I have read so much that stated just one. Acutally it stated that Pythons were one of the few that has 2 lungs but they breathe opposite of us. Which is really weird to think about if you break it down. lol. We will have to wait for the experts here. I know they do not use much oxygen. It will be interesting to see who chimes in on this as I would like to know what the real deal is with this.