Elon Musk said in an interview this week with Fox News host Jesse Watters that his focus on Mars has to do with ensuring humanity's longterm survival.

Stratolaunch tests reusable hypersonic rocket plane. Stratolaunch has finally found a use for the world's largest airplane.

Just one day after the FAA gave SpaceX the green light to move forward with as many as 25 rocket launches per year at its ...