Scientists in Germany created tiny magnetic coatings for very small algae. They think these coated algae could be guided by magnets to deliver medicine to specific areas in the body.

It is interesting that they have successfully tested the magnetic micro-algae in tightly confined and viscous environments. Those are the same conditions they would find in living tissue and blood vessels.

Still, this is just a proof-of-concept. I wonder if any useful treatments for illness ever come from it.