Nanotechnology: sci-fi or sci-fact?

We've seen them in movies, but how close are we to having nanorobots in reality? And what will we do with them? We'll be unpicking the tiny details of nanotechnology! Plus in the news this week: as Omicron cases continue to rise, what can we learn about it from South Africa? Researchers figure out why quitting smoking often leads to weight gain. And why we're bad judges of when we're over the drink-drive limit Like this podcast? Please help us by supporting the Naked Scientists