The White House's Department of Government Efficiency laid off about 1,000 National Park Service workers last month as part of its wave of federal mass firings.

showcasing the moment America's first civil supersonic jet broke the sound barrier last month. The photograph, captured by NASA, shows the shock waves surrounding Boom Supersonic's demonstrator ...

"The sound waves create microscopic bubbles in a diazonium salt solution, which then collapse rapidly, creating tiny bursts of heat and pressure," Associate Professor Darwish said. "This triggers ...