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President Obama once said he would go to Cuba only if the human rights situation on the island improved. Critics say he's crossed his own red line by going now when political arrests are up.

The theoretical physicist is part of a team that wants to send postage-stamp-size probes to our closest star system, Alpha Centauri. But can they get the proper permits?

Gifted education in this country is a patchwork of underfunded programs and gifted kids who start school not speaking English, are the least likely to be served.

A study offers a rare look at how well toddlers are doing in low- and middle-income countries.

Candidates are talking about taxes and trade, but not about the tsunami: the massive wave of automation that will transform the workplace.

The Navy's littoral combat ships are plagued by problems including engine failure and power losses. The ships were supposed to be nimble and versatile but instead have proved costly and ineffective.

Health care workers are anxious that Zika is spreading across the country undetected — and worry that the system is ill-equipped to deal with severe birth defects.

As the U.S. and Russia struggle to bring peace to Syria, civilians are paying the toll. A United Nations report documents a surge of violence in recent months and atrocities are mounting.

For workers who want a raise, this was an encouraging week, with minimum-wage legislation gaining momentum and employers paying more across the board.

Renee Montagne talks to Kei Kawashima-Ginsburg of Tufts University about the impact young voters have been having in the primary elections, and what that might mean in Tuesday's Wisconsin primary.