Can Robot Worms Kill Cancer?

Scientists are creating tiny mechanical "nanoworms" that could zip through the human body like cruise missiles, finding cancerous tumors that are too small to be seen any other way. That could lead to very early detection before the cancer even begins to spread, and ultimately these tiny vehicles — 3 million times smaller than an earthworm — may be able to deliver a lethal blow to the tumor. "We want them to be able to release a drug and kill the tumor" without damaging adjacent tissue, said...Full Story