Key points from article :
Nanobots able to walk and withstand harsh environments.
Can be injected using an ordinary hypodermic syringe.
A million can be produced from a single 4-inch silicon composite wafer.
Feature four legs composed from graphene or platinum and titanium.
Can carry objects 1,000 times bigger than themselves.
New nanofabrication techniques were developed by Marc Miskin et al at Cornell University.
