The Para-Rigger

Since 1993, the United States has seen a drop in the rate of homicides and other violence involving guns, according to two new studies released Tuesday. Using government data, analysts saw a steep drop for violence in the 1990s, they saw more modest drops in crime rates since 2000.

"Firearm-related homicides dropped from 18,253 homicides in 1993 to 11,101 in 2011," according to a report by the federal , "and nonfatal firearm crimes dropped from 1.5 million victimizations in 1993 to 467,300 in 2011.

There were seven gun homicides per 100,000 people in 1993, the says, which dropped to 3.6 gun deaths in 2010. The study relied in part on data from the .

This idea that nature is inherently probabilistic — that particles have no hard properties, only likelihoods, until they are observed — is directly implied by the standard equations of quantum mechanics. But now a set of surprising experiments with fluids has revived old skepticism about that worldview. The bizarre results are fueling interest in an almost forgotten version of quantum mechanics, one that never gave up the idea of a single, concrete reality.