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The private space company has launched the Falcon Heavy, a rocket more powerful than any other in use today. It's now bearing a roadster into an elliptical Earth-Mars orbit. Watch the rocket's flight.

The cluster, found in central Appalachia and first reported by NPR, indicates that a disease once thought to be on the decline is still a common killer among coal miners.

Steve Inskeep talks to Tristan Harris of the Center for Humane Technology about how to protect children and ourselves from what some call the "crisis of online addiction."

China has placed one or more acoustic sensors — listening devices — in the Mariana Trench, near the island of Guam, which is home to a major U.S. military base.

U.S markets showed signs of volatility on the heels of Monday's drop on Wall Street. NPR's Rachel Martin, Jim Zarroli and Scott Horsley talk about the plunge and the White House's reaction.

Technology that uses electrical stimulation to tweak the brain may eventually help people with memory problems caused by a brain injury or Alzheimer's disease.

President Trump, who often boasted when the stock market hit record highs, has said nothing as the market enters a period of volatility.

The trash was piling up in the gutter. A young man in Nigeria wanted to get local kids to help clean it up. His campaign has gone viral.

With three fatal train accidents in recent weeks, there's been a cry for Positive Train Control, a system that will automatically stop trains before certain types of accidents can happen. WIlliam Vantuono, editor-in-chief of Railway Age, explains how PTC works and why it's taking so long for it to be widely adopted.

The stock market plunged more than 1,000 points on Monday, reversing the growth in the markets throughout 2017. Richard Salmen is chair of the Certified Financial Planner Board of Standards talks with NPR's Ari Shapiro about what consumers should be doing.