What exactly is dark matter? We can’t see it, but we can observe its ghostly gravitational effects on the behaviour and evolution of galaxies. Watch the Q&A with Peter here: https://www.youtube.com/watch?v=FM3X06fRNhM Buy Peter's book 'What is Dark Matter?' here: https://geni.us/sTil0I Join particle physicist Peter Fisher as he explores leading-edge research focused on revealing dark matter’s true nature and what it will mean to science when we do. In this talk, discover the mysterious, nonluminous form of matter that is believed to account for about 27 percent of the mass-energy balance in the universe. This talk was recorded on 6 September 2022. Peter Fisher is a professor in the Physics Department at MIT and currently serves as department head. He carries out research in particle physics in the areas of dark matter detection and the development of new kinds of particle detectors. He also has an interest in compact energy supplies and wireless energy transmission. Peter received a BS Engineering Physics from Berkeley in 1983 and a Ph.D. in Nuclear Physics from Caltech in 1988. The Ri is on Patreon: https://www.patreon.com/TheRoyalInstitution and Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and TikTok: https://www.tiktok.com/@ri_science Listen to the Ri podcast: https://anchor.fm/ri-science-podcast Our editorial policy: https://www.rigb.org/editing-ri-talks-and-moderating-comments 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.