Modified gravity and dark matter
  The fundamental nature of Dark Matter (DM) has not been established. Indeed,
beyond its gravitational effects, DM remains undetected by present experiments.
In this situation, it is reasonable to wonder if other alternatives can
effectively explain the observations usually associated with the existence of
DM. The modification of the gravitational interaction has been studied in this
context from many different approaches. However, the large amount of different
astrophysical evidences makes difficult to think that modified gravity can
account for all these observations. On the other hand, if such a modification
introduces new degrees of freedom, they may work as DM candidates. We will
summarize the phenomenology of these gravitational dark matter candidates by
analyzing minimal models.
