Introduction

Virtual reality technology helps surgeons in brazil and britain collaborate to separate two twin boys joined at the head. But what's the future of this virtual reality system in medicine? I hear from one of the team who helped build thet and it's getting hotter. How do we keep computers that power everything from cute kitten vidios to on line banking cool and do it in a green, energy efficient way? With me on this journey into tech is our reporter, shona mc allam,. This week she looks at vinal and how to make it greener.