While SpaceX lost the upper stage of its new Starship in a flight test, the futuristic spacecraft presages a spaceflight revolution, says a leading U.S. space scholar.
Elon Musk, the world's richest man, earns over 23 million every hour and has a net worth of around 430 billion. Known for selling his mansions to live in a $50,000 prefab near SpaceX, Musk is heavily ...