This week, the academic Kate Crawford tells us how she travelled the world to find the true cost of AI. Reporter Chris Vallance updates us on a watermark system - developed by Deepmind, Google's AI arm - which aims to show whether an image was generated by a machine or designed by a human. Mansoor Hamayun, Co-Founder and CEO of Bboxx tells us about the company's smart cooking valve, designed to protect lives - and trees - in Rwanda. We speak to Fu’ad Lawal, the founder of Archivi.ng,and archivist Grace Abraham, about why the key to Nigeria's tech future may lie in digitsing newspapers from its past. (Picture credit: an imagined digital landscape, by Andriy Onufriyenko, for Getty images)