The Federal Aviation Administration has issued a stark warning to air pilots about the dangers of exploding space rockets after a pair of failed SpaceX launches that showered deadly debris over busy ...

Dozens of startups working on data centers, mining and pharmaceuticals are hanging on Elon Musk's long-stalled megarocket.

For more than 60 years, nearly every large rocket used some combination of the same liquid and solid propellants. Refined kerosene was favored for its easy handling and non-toxicity, hydrazine for its ...