This may be of special interest to physicians, but IMO, this is an entirely new branch of physics with stunning practical applications.
NOVA recently had an excellent presentation of nano technology for use in many applications, including curing (destroying) different types of cancer without damage to the rest of the body. They are almost ready to test on humans.
Excerpt (chapters 5 & 6),
SAM WICKLINE: No. We like the bees because they make a toxin. The toxin is melittin, and we use it to, specifically, to treat cancers.
DAVID POGUE: Bee venom is a cancer drug?
SAM WICKLINE: Yes, bee venom is an excellent cancer drug. It’s been known for quite some time, but the problem is how to deliver it.
DAVID POGUE: Melittin is not being used yet to fight cancer, because it will destroy any cell it bumps into, including healthy ones. But, realizing its potential, Sam set out to engineer a nano-scale robot to carry the toxin safely through the body and release it only when it finds its target. Not surprisingly, he calls his invention nanobees