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 ...

Not long ago in Seattle, an astronomical event of sorts happened: Two superstars collided. William Shatner, of "Star Trek" fame, and Neil deGrasse Tyson, America's favorite astrophysicist, took to the ...

Top Intel Dem speaks out after classified briefing on Venezuela, Maduro's capture: Trump admin 'doesn't have a plan' ...