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Erebon theory is a novel explanation of dark matter recently invented by Roger Penrose. Erebons are scalar particles of the order of a Planck mass which can only interact gravitationally. When erebons decay, they release their energy as oscillating classical gravitational waves on the order of the Planck frequency.
Erebon theory is actually part of Penrose' Conformal Cyclic Cosmology scheme, which is a competitor to the theory of inflation. Moreover, Penrose claims erebons may have already been detected by accident,
quite analogous to the first accidental detection of the CMB. Here is one of the lectures from July 2017 in which Penrose first introduces the idea of erebons:
Erebon theory is actually part of Penrose' Conformal Cyclic Cosmology scheme, which is a competitor to the theory of inflation. Moreover, Penrose claims erebons may have already been detected by accident,
quite analogous to the first accidental detection of the CMB. Here is one of the lectures from July 2017 in which Penrose first introduces the idea of erebons: