How Does Aspirin Know Where It Needs to Go?

Aspirin, also an aphrodisiac, because it cures headaches. But how does the aspirin know where the headache is? It doesn't. You pop a pill, and the painkiller gets absorbed through your stomach or small intestine depending on what the drug is. And it goes everywhere in your body - but there are some tissues that are off limits to drugs. So last week I was watching the Formula One in Sergio Pérez, across the line to win the Grand Prix. There was a huge fireworks display, and it got me thinking: would fireworks work on Mars? How would it look? We have a voice note in it. What's the matter? How'd it