http://people.zeelandnet.nl/smitra/mirror.htm#Articles

This is a world having the same micro particle physics as ours, but at a much lower temperature and is considered to be a good candidate for dark matter. Foote claims it satisfies all dark matter requirements (see abstract below).

Seems also to be a rather good candidate for a heaven/hell/purgatory type world, as evidenced by religious revelation, that of Swedenborg being most detailed: http://www.newdualism.org/Swedenborg.htm

Nobelist Glaskow claims that such a world could not exist, but work on a mirror world has expanded since his publication. So his claim must be circumvented

Mirror matter-type dark matter

R. Foot

There are six main things which any non-baryonic dark matter theory should endeavour to explain: (1) The basic dark matter particle properties [mass, stability, darkness]; (2) The similarity in cosmic abundance between ordinary and non-baryonic dark matter, $\Omega_B \sim \Omega_{dark}$; (3) Large scale structure formation; (4) Microlensing (MACHO) events; (5) Asymptotically flat rotation curves in spiral galaxies; (6) The impressive DAMA/NaI annual modulation signal. Only mirror matter-type dark matter is capable of explaining all six of these desirable features. The purpose of this article is to provide an up-to-date and pedagogical review of this dark matter candidate.
Int.J.Mod.Phys. D13 (2004) 2161-2192

• light on dark matter? - dolphin - February 11, 2006 - 09:38 UTC