  We study linear cosmological perturbations in the ``healthy extension'' of
Horava-Lifshitz gravity which has recently been analyzed \cite{BPS2}. We find
that there are two degrees of freedom for scalar metric fluctuations, but that
one of them decouples in the infrared limit. Also, for appropriate choices of
the parameters defining the Lagrangian, the extra mode can be made well-behaved
even in the ultraviolet.

High Energy Physics - Theory;Cosmology and Nongalactic Astrophysics;General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology