So do candidates for the particles that make up dark matter, a shadowy substance whose presence can be deduced from its gravitational pull (see article) but which does not interact much via the three Standard-Model forces.

ECONOMIST: The hunt for physics��s most elusive quarry is over

In general, these findings argue strongly against the idea that the effect of expanding coverage on utilization can be deduced simply from the reduction in patient cost sharing.

FORBES: Why We Should Worry About Massively Expanding Medicaid