The latest, most sensitive searches for the particles thought to make up dark matter-the invisible stuff that may comprise 85 percent of the mass in the cosmos-have found nothing. Called WIMPs (weakly interacting massive particles), these subatomic shrinking violets may simply be better at hiding than physicists thought when they first predicted them more than 30 years ago. Alternatively, they may not exist, which would mean that something is woefully amiss in the underpinnings of how we try to make sense of the universe. Many scientists still hold out hope that upgraded versions of the experiments looking for WIMPs will find them but others are taking a second look at conceptions of dark matter long deemed unlikely.
Paul Sutter is an astrophysicist at The Ohio State University and the chief scientist at COSI Science Center. Sutter is also host of Ask a Spaceman, RealSpace, and COSI Science Now. It's not often that you can get promoted, commended and even awarded for failing to do your job. Usually, it's the exact opposite. So how exactly did Arno Penzias and Robert Wilson - two who-the-heck-are-those-guys at Bell Labs in the 1960s - win a free trip to Stockholm and a shiny golden Nobel medal? The cosmic contenders First, a little setup. At the time, the Big Bang theory wasn't the high-and-mighty, universal champ model to explain the end-all and be-all in the cosmos that it is today. Far from it: while a