MD or DM? Modified dynamics at low accelerations vs dark matter

Understand

The MOND paradigm posits a departure from standard Newtonian dynamics, and from General Relativity, in the limit of small accelerations.

• The resulting modified dynamics aim to account for the mass discrepancies in the universe without non-baryonic dark matter.
• I briefly review this paradigm with its basic tenets, and its underlying theories--nonrelativistic and relativistic--including a novel, bimetric MOND gravity theory.
• I also comment on MOND's possible connection to, and origin in, the cosmological state of the universe at large.