Welcome back, Spherical Cow Moonions!This week, we are talking about Dark Matter! We will be discussing why the notion of dark matter was first introduced, what evidence there is for the existence of dark matter and what dark matter could be.Please see an addition to our discussion below:To view our sources please see our website - https://www.podpage.com/spherical-cow/N.B. Parts of this episode were recorded virtually so the audio quality might be different to normal.