Ten years ago, on June 28, 1993, the U.S. Supreme Court issued "the most influential ruling you've never heard of," says the Project on Scientific Knowledge and Public Policy. In the case known as Daubert v. Merrell Dow Pharmaceuticals, Inc., they directing judges to act as "gatekeepers" in the courtroom, excluding expert testimony if they deemed it was "junk science." "But what started as a well-intentioned attempt to ensure reliable and relevant evidentiary science has had troubling consequences. ... Polluters and manufacturers of dangerous products are successfully using Daubert to keep juries from hearing scientific or any other evidence against them."