What winds up on the shelf is the result of constant evaluation, competing priorities and calculated decisions.

Four astronauts have embarked on a high-stakes flight around the moon. It's humanity’s first lunar voyage in more than half a ...

With gas prices crossing $4 a gallon, the EPA says cheaper, more ethanol-rich fuel will ease the pain. The math doesn't ...

NASA’s Artemis II is set for liftoff with a crewed Moon flyby, testing deep space systems over 10 days, but with high risks ...