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 ...

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

On January 28, 1986, Space Shuttle Challenger broke apart just 73 seconds after liftoff. Pilot Michael Smith's final words ...