  Dark matter in the universe seems to be one of the most important puzzles
science has to face in this moment. In this essay we point out that dark matter
could be a spin-0 fundamental interaction of Nature rather than a simple
particle. From this hypothesis follows that dark matter behaves just as
standard cold dark matter at cosmological level while still in good agreement
with observations at galactic scales. This new interaction could be one of the
scalar fields predicted by higher-dimensional theories.
