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Scientists seem to have answered a fundamental question about the nature of memory. They have found compelling evidence that memories are made by strengthening connections between certain brain cells.

Most states have embarked on a significant expansion of preschool programs, but a new report says they appear to be missing the kids who need these programs most: low-income, immigrant children.

The justices ruled that federal authorities erred by invoking the chemical weapons treaty in prosecuting a woman who attacked a romantic rival with chemicals.

The king of Spain says he is stepping down, ceding the throne to the crown prince. King Juan Carlos has been in ill health, and his popularity has dropped recently after a series of scandals.

The Obama administration is announcing new pollution standards Monday. The rules, key elements of President Obama's climate change policy, may decide the fate of coal-fired power plants in the U.S.

People are less likely to seek shelter or otherwise prepare for storms given female names, researchers say. As a result, such storms result in nearly twice as many deaths as those with male names.

Wim Elfrink, the executive vice president of Cisco, speaks to Robert Siegel about the Internet of Things and how Cisco plans to participate in this growing market.

For more on the Internet of Things, Audie Cornish speaks with Alex Hawkinson, CEO of the startup company SmartThings, about the possibilities of this emerging space and technology.

By testing for radiation, detectives tried to show that wine bottles purportedly from Thomas Jefferson's collection were fake. And with wine fraud rising, authentication is getting more sophisticated.

The government expects as many as 60,000 child immigrants to illegally enter the U.S. alone this year — a tenfold jump in just three years.