  Dark Energy is the largest fraction of the energy density of our Universe -
yet it remains one of the enduring enigmas of our times. Here we show that Dark
Energy can be used to solve 2 tantalizing mysteries of the observable universe.
We build on existing models of Dark Energy linked to neutrino masses. In these
models Dark Energy can undergo Phase Transitions and form Black Holes. Here we
look at the implications of the family structure of neutrinos for the phase
transitions in dark energy and associated peaks in black hole formation. It has
been previously shown that one of these peaks in Black Hole formation is
associated with the observed peak in Quasar formation. Here, we predict that
there will also be an earlier peak in the Dark Energy Black Holes at high
redshifts. These Dark Energy Black Holes formed at high redshifts are
Intermediate Mass Black Holes (IMBHs).These Dark Energy Black Holes at large
redshift can help explain both the EDGES observations and the observations of
large Supermassive Black Holes (SMBHs) at redshifts $z \sim 7$. The existence
of an earlier phase of Dark Energy Black Holes take care of some current
challenges to theory implied by existing astronomical data and also helps us
look for these Dark Energy Black Holes at high redshifts as predicted here
through targeted searches for these Black Holes at the redshifts $z \sim 18$.
There is a slight dependence of the location of the peak on the lightest
neutrino mass - so the peak may be located at a slightly lower value of the
redshift. This may actually enable a measurement of the lightest neutrino mass.
Finding these Dark Energy Black Holes of Intermediate Mass should be within the
reach of upcoming observations - particularly with the James Webb Space
Telescope - but perhaps also through the use of other innovative techniques
focusing specifically on the redshifts around $z \sim 18$.
