Why do we grow old? Integrative Biologist Joao Pedro de Magalhaes explains what aging is and how we can extend our lifespan. Subscribe to PHD TV! www.youtube.com/subscription_center?add_user=phdcomics More at: phdcomics.com/tv Follow us on Facebook: www.facebook.com/piledhigheranddeeper Twitter: twitter.com/phdcomics Animated by: Jorge Cham Produced by Piled Higher and Deeper in partnership with The Integrative Genomics of Ageing Group at The University of Liverpool. Funding provided by The University of Liverpool. Featuring: Joao Pedro de Magalhaes pcwww.liv.ac.uk/~aging/ For more information on Aging: www.senescence.info/