It's Royal Society of Chemistry podcast time again.

We take painkillers like paracetamol for granted these days, but when aspirin emerged on the scene, it was a dramatic breakthrough. Its cousin might have been easing pain as powdered willow bark for millennia, but this was something special - so special, in fact, that it featured in a treaty that ended a world war. Have a listen to the rise, fall and rise again story of aspirin.