SpaceX’s Dragon spacecraft, carrying the Ax-4 crew, is expected to splash down off the coast of San Diego at 2:31 a.m. PT on ...

A sonic boom might announce the return of a SpaceX spacecraft from the International Space Station before it splashes down ...

NASA plans to conduct community overflights beginning this year, flying the X-59 over select American cities to collect ...

Thunder is the acoustic shock wave from the extreme heat of a lightning flash. The latest edition of Science Behind the ...