Now, what seems to be the problem? The answer, it turns out, might well be hundreds of millions of years of viral and bacterial infections. This week we're talking about the history of mankind and civilisation through the lens of disease, which proves out to be more mind-blowing than you might expect. Plus, plenty of our normal nonsense (hats, soap, etc.) and a Recommendation Engine to wrap things up. Enjoy. This episode's mistakes include:

• Unusual podcast segment order.

Praise our retrovirus ancestors, then like us on Facebook, follow us on Instagram and Spotify, rate us on Apple Podcasts, and send your questions to [email protected].