For years, popular culture has treated a human settlement on Mars as an almost inevitable next chapter, a matter of engineering and willpower rather than fundamental limits. Astrophysicist Neil ...

President Donald Trump’s single reference to space in his second inaugural address Monday pointed in an unexpected direction. In his prepared remarks, Trump, a longtime backer of U.S.-led space ...

With the help of his space company’s gigantic Starship rocket, the mercurial entrepreneur wants to ensure the “long-term survival of consciousness” by ferrying a million settlers to permanent ...