Everything around us is made of ‘stuff’, or matter. But what is it, exactly? Subscribe for regular science videos: http://bit.ly/RiSubscRibe Buy Jim's book "Mass: The quest to understand matter from Greek atoms to quantum fields" - https://geni.us/BGZ0Pd Jim Baggott will explore our changing understanding of the nature of matter, from the ancient Greeks to the development of quantum field theory and the discovery of the Higgs boson. Jim Bagott is an award-winning science writer. He trained as a scientist, completing a doctorate in chemical physics at the University of Oxford in the early 80s, before embarking on post-doctoral research studies at Oxford and at Stanford University in California. The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter Product links on this page may be affiliate links which means it won't cost you any extra but we may earn a small commission if you decide to purchase through the link.