Some gun violence experts are skeptical. But the research raises questions of whether there’s a cause-and-effect relationship and if so, what’s behind it.

The Nuclear Regulatory Commission plans to end longstanding guidance that radiation exposure be “as low as reasonably achievable.”

© Audra Melton for The New York Times

The car’s driver-assistance system was in use when the crash killed a woman on Friday, the police said.

The driver told investigators he was using the vehicle’s automated-driver system when the vehicle left the roadway and crashed into a house in Harris County, Texas.

Innovative systems to keep ships from hitting North Atlantic right whales are coming into use. The Trump administration is weighing whether they can replace a bedrock protection.

Innovative systems to keep ships from hitting North Atlantic right whales are coming into use. The Trump administration is weighing whether they can replace a bedrock protection.

© Sophie Park for The New York Times