Non-Baryonic Dark Matter
	• I’m no expert on this stuff (and in some sense NO ONE is).  Particle physicists play in this area more than astronomers. • Leading candidates include – Axions.  Cold, low mass, avoid strong CP violation. – Neutrinos.  Hot, low mass (getting better constrained), lots of them.  SN helps. – WIMPs.  Gravitino, photino, etc. – Mirror Matter.  May use in my next novel.