  Water nanoclusters ejected to space from abundant amorphous water-ice-coated
cosmic dust have been proposed to constitute Rydberg baryonic dark matter. This
phenomenological model is now qualitatively supported by several recent
observations: the laboratory-generated ejection of water nanoclusters from
amorphous water-ice; the absence of dark matter in Galaxy NGC 1052-DF2; a
recent study of dark matter in distant galaxies reporting the direct
interaction of dark matter with galactic baryonic matter; the bullet cluster;
and the birefringence of the cosmic microwave background. A link between
Rydberg dark matter and dark energy and its relevance to quintessence are
reviewed. The use of the James Webb Space Telescope to test this model further
is suggested.
