k-Mouflage gravity
  We introduce a large class of scalar-tensor theories where gravity becomes
stronger at large distances via the exchange of a scalar that mixes with the
graviton. At small distances, i.e. large curvature, the scalar is screened via
an analog of the Vainshtein mechanism of massive gravity. The crossover
distance between the two regimes can be made cosmological by an appropriate
choice of the parameters.
