doomy writes: Mr. Lee Spievak, a sixty nine year old man who lost part of his finger in an accident was able to grow it back with help of a new medical breakthrough loving dubbed "Pixie dust". His brother, Alan Spievak, who works in the field of regenerative medicine supplied him with this almost magical powder. "Pixel Dust", scientifically called extra cellular matrix was created at the University of Pittsburgh through a process that involved scraping the cells from the lining of a pig's bladder and converting it into a sterilized dust. It took less than four weeks for Mr. Spievak to grow back his severed finger along with new nerves, tissues, skin and even a brand new finger nail. The whole process is documented graphically in this bbc video. The US military is also interested in this breakthrough and researchers hope that this dust would lead to tissue regrowth on entire limbs and organs. The dust is currently being tried out on a cancer patient to stimulate regrowth of healthy tissues in her cancerous esophagus.