You've probably heard about the isolating material asbest which was used a lot around the turn of the 1900's. It got these long fibers that pierces the cell and accelerates rapid cell growth. This cell growth more than often gives the recipient cancer in the lung. In the recent issue of nanotechnology nature (maybe it was in the pre-articles) they've modeled long and short CNT in the lining of the lung and in some lungtissue in mice. The long nanotubes behaved almost like asbest, causing cell change and piercing the cell from wall to wall. The short nanotubes didn't act like asbest. So what do you people think about this? CNT's are here to stay, or is this a deathsentence to that field in nanotechnology? I personally think that there needs to be more articles and more research, and that the long CNT's be handled with caution at the very least. I think this could get very serious effetcs on the nano-industry and getting funding for nano-research, I so hope this won't kill the industry in it's cradle.