NASA has moved to replace the long-planned Exploration Upper Stage for its Space Launch System rocket with United Launch Alliance’s Vulcan Centaur 5 upper stage, a shift that could reshape the Artemis ...

NASA has wasted no time in selecting the vehicle that will replace the upper stage on its new plans for a standardized Space Launch System rocket.

Have you ever watched a mile-long freight train rumble by and wondered how one locomotive can pull more than a hundred fully loaded cars? The locomotive weighs maybe 150 metric tons, and each car is ...

Controlling light with light is a long-sought goal for computing and communication technologies. Achieving this capability ...

Casey Gallagher, MD, is a dermatologist and clinical professor in the Department of Dermatology at the University of Colorado Denver. Acne affects about 50 million people in the U.S. yearly, making it ...