The existence of dark matter solves some mysteries in astronomical observations, and fits in with the measurements of the afterglow of the big bang. Otherwise, it is hypothetical stuff for which there is currently no direct evidence. In this talk, we shall go on a journey to the unimaginably huge and the incredibly tiny, from back to a blink in an eye after the big bang to the present day. Along the way, I shall describe one of the main reasons that we believe in dark matter, and describe how the Large Hadron Collider might feasibly produce enough of it to study. We shall also visit the discovery of the Higgs boson, and explore why it is important.