The two solid rocket boosters flew in different directions as the external fuel tank became a fireball.(AP: Bruce Weaver / File) Forty years ago, the Challenger space shuttle disintegrated just after ...

The military tested a new approach in Venezuela and during strikes on Iranian nuclear facilities. By Julian E. Barnes and Adam Sella Reporting from Washington The United States used cyberweapons in ...

Investigators are reviewing body-camera videos from immigration agents in the fatal shooting of Alex Jeffrey Pretti, a Department of Homeland Security spokesperson confirmed to NBC News. Homeland ...

Federal agents shot and killed a 37-year-old Minneapolis resident, Alex Jeffrey Pretti, at about 9 a.m. Central time on Saturday morning. A video shared with The New York Times by a witness and her ...

NASA is quietly ending financial support for independent planetary science advisory groups, according to a letter posted to the agency’s website on January 16. The affected groups have historically ...

The question of whether you should turn your PC off every time you're done using it or if it is okay to leave it running all the time has often been debated – with varying answers of many degrees over ...

SAN FRANCISCO—They came to testify to the life-saving benefits of medical research. They came to explain how scientific discoveries avert disasters and keep skyscrapers standing during earthquakes.

At first glance, some scientific research can seem, well, impractical. When physicists began exploring the strange, subatomic world of quantum mechanics a century ago, they weren't trying to build ...