Tiny robots could roam inside our bodies, delivering drugs with unprecedented precision…

Call it another case of science fiction becoming scientific fact. Researchers have long dreamed of developing tiny robots that could roam about inside our bodies, delivering drugs with unprecedented precision, and hunting down and destroying cancer cells.

We’re not there yet, but we’re getting close. Last month scientists from China’s National Center for Nanoscience and Technology (NCNT) and Arizona State University said they had developed robots a few hundred nanometers across — there are 25 million nanometers in an inch — and when they injected them into the bloodstream of mice, the nanorobots could shrink tumors by blocking their blood supply.