We prove that the Newhouse phenomenon has a codimension 2 nature. Namely, there exist codimension 2 laminations of maps with infinitely many sinks. The leaves of the laminations are smooth and the sinks move simultaneously along the leaves. These Newhouse laminations occur in unfoldings of rank-one homoclinic tangencies. As consequence, in the space of polynomial maps, there are examples of:

- two dimensional Hénon maps with finitely many sinks and one strange attractor,

- Hénon maps, in any dimension, with infinitely many sinks,

- quadratic Hénon-like maps with infinitely many sinks and a period doubling attractor,

- quadratic Hénon-like maps with infinitely many sinks and a strange attractor,

- a non trivial analytic one-parameter family of quadratic Hénon-like maps with infinitely many sinks,

- two dimensional Hénon maps with finitely many sinks and two period doubling attractors.