This guy is a rock star! I wanna go back to school for astrophysics! If only it paid the bills…

Hunng…this is so unsatisfying. I get that we can infer the presence of dark matter, but we (me and others likewise uninformed) are lacking a good, physically plausable explanation of what it really is. WIMPs? Axions? What process is so pervasive that makes these represent so much mass and energy in the universe?