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"Demographics are destiny" has almost become a political cliché, but, so far in this campaign, it's holding true. That gives some clues for how people might vote in the New York primary in a week.

Physicist Stephen Hawking and billionaire Yuri Milner have announced a $100 million mission to prepare for interstellar exploration — with a stamp-size spacecraft, light sails and enormous lasers.

Federal prosecutors recently extradited a man from Singapore to face charges he helped conspire to evade export-control laws and send material that wound up in improvised explosive devices in Iraq.

A new UNICEF project takes real-life stories of Syrian refugee kids and turns them into short — and really intense — animated videos.

Poet Tess Taylor's new book, Work & Days, is a lyrical meditation on food and farming and our "fragile and ultimately, necessary relationship we have with the earth." Download her illustrated poems.

NPR's Robert Siegel interviews Elaine Kamarck, a senior fellow in the governance studies program and director of the Center for Effective Public Management at the Brookings Institution, about why a contested convention seems undemocratic to some, but is protected by the First Amendment and supported by the courts. She gives examples in history and compares the U.S. system with democracies around the world.

Decisions about high blood pressure have gotten thornier over the past couple of years. There's no consensus on when to start treatment with drugs. The latest evidence adds to the confusion.

Researchers are starting to look at the therapeutic possibilities of psychedelic drugs. A sensation that the self is merging with the world could be due to changes in brain connections, a study says.

The crash that killed 11 people in February appears to have been caused by a distracted dispatcher, prosecutors say. The controller has been arrested and may face charges of negligent homicide.

Mexico City has its worst smog in more than a decade. The government has ordered cars off the street one day a week, but city planners say that isn't a long-term solution.