Comments allow readers to respond to an article instantly, asking questions, pointing out errors, giving new leads. At their best, comment threads are thoughtful, enlightening, funny: online...

Is crime in America rising or falling? The answer is not nearly as simple as politicians sometimes make it out to be, because of how the FBI collects and handles crime data from the country’s...

Mass killings in the United States are most often carried out with guns, usually handguns, most of them obtained legally. There is no universally accepted definition of a mass shooting, and...

  How many movies are actually about men? What changes by genre, era, or box-office revenue? What circumstances generate more diversity?

America is being watched from above. Government surveillance planes routinely circle over most major cities — but usually take the weekends off.

This investigation of scientific p-values is anchored by an interactive graphic where users can give "p-hacking" a try on their own. These are tricky statistical concepts, made accessible to all...