Wired.co.uk Podcast 111: IBM's 'Doctor' Watson, Twitter cashtags and violent robo-rats

Summary: <p>This week we discuss the cancer diagnosis skills of IBM's Watson, how Twitter is letting people pay for products using hashtags and the robotic rats that are used to make real lab rats depressed</p> <p>Show produced and edited by Nate Lanxon<br> Hosts: Nate Lanxon, Olivia Solon</p>