Is Time Travel really Possible? In this clip Professor Brian Cox - a confirmed Doctor Who fan - undertakes an experiment to see. Subscribe: http://bit.ly/SubscribeToDoctorWho WATCH MORE: GERMAN: https://bit.ly/DoctorWhoDeutsch FRENCH: https://bit.ly/DoctorWhoFrancais ITALIAN: https://bit.ly/DoctorWhoItaliano The Brand New Doctor Who Website - http://www.doctorwho.tv Doctor Who YouTube Channel http://www.youtube.com/user/doctorwho Doctor Who Facebook: https://www.facebook.com/DoctorWho Doctor Who Twitter https://twitter.com/bbcdoctorwho This is a commercial channel from BBC Studios. Service & Feedback https://www.bbcstudios.com/contact/contact-us/