Sign up for an annual CuriosityStream subscription and you’ll also get free access to Nebula (a new streaming platform I’m helping to build along with other creators). Use my promo code when signing up to get a 30-day free trial: https://curiositystream.com/cogito Watch ad-free over on Nebula: https://nebula.tv/videos/cogito-what-was-the-indus-valley-civilisation In British India in the 1920’s odd stone […]