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Prescription sleep medications, also called hypnotics, rank among the most-advertised and most-prescribed drugs in the United States. Might these pills be doing more than helping people get a good night’s sleep?

Facebook is apparently getting a lot more unfriendly. Users are getting a lot more selective, deleting comments, photo tags, and even friends at a record rate, according to a new study released Friday by the Pew Internet and American Life Project.

As the number of interracial marriages in the U.S. continues to rise, so does Americans’ acceptance of them, a new Pew Research Center report finds.

A study of a widely used system to provide security for Internet shopping, banking and other services showed that it failed to work correctly in a small number of cases.

A pair of Earth-size worlds orbiting a dying star may be the fractured remnants of a single Jupiter-like gas giant, a new study says.

Anyone who’s done it knows that online dating can be a giant pain in the neck. But it works. A new study analyzing 400 academic studies related to online dating found that although it’s far from perfect, it has plenty of advantages. And it has dramatically transformed the way people find mates.

The United States Constitution was once a model for charters around the world, but its influence is waning, according to a new study.

Two years ago, scientists at the National Center for Atmospheric Research in Boulder, Colo., released a study claiming that inconsistencies between satellite observations of Earth's heat and measurements of ocean heating amounted to evidence of "missing energy" in the planet's system.

More than 40 years after the federal government enacted fair-housing legislation and the Great Migration of blacks from the South began to ebb, residential segregation in metropolitan America has been significantly curtailed, according to a study released Monday.

Two Harvard researchers looked at the factors that actually improve student achievement and those that don’t. In a new paper for the National Bureau of Economic Research, Will Dobbie and Roland Freyer analyzed 35 charter schools, which generally have greater flexibility in terms of school structure and strategy. They found that traditionally emphasized factors such as class size made little difference, compared with some new criteria...