Dark Matter (Why is it dark? Does it Matter?) – Dr. Steve Barrett Post author:Webmaster Post published: Post category:Learning Zone Lockdown Lectures – On the 2nd March 2021, our good friend Dr. Steve Barrett gave a talk to the Causeway U3A group and has kindly shared his lecture slides and video with us! Download the slides here! Watch the video here! You Might Also Like Constellations: Ursa Major About Venus How to make a very sensitive jam jar magnetometer by Robert Cobain