When you get a clog in the plumbing in your house, it's often annoying. When you get a clog in the plumbing in your body, it's often fatal. Blood clots can cut off circulation to your brain, causing serious damage, but a new type of nanoparticle might be able to act like Drano, dissolving clots before anything bad happens.
Bacteria are clever little buggers. Every time we hit them with a new drug that kills 99.9% of them, that left-over 0.01% regroups and breeds and we're back to square one. We're going to run out of drugs before the bacteria run out of evolution — which means we need some new weapons in our arsenal.