The double-edged sword of nanoTubes

Nanotubes have unusual properties that may advance our ability to target drug delivery especially in cancer tumors, but at the same time the technology has the potential to cause cancer similar to asbestos.

http://nano.cancer.gov/news_center/nanotech_news_2005-08-22d.asp

Nanotechnology - Health Risks - Mice Study Suggests Potential Health Risk in Tiny Carbon Fibers - New York Times

http://www.nature.com/nnano/journal/v3/n7/abs/nnano.2008.111.html