The primary difficulty of interstellar communication is finding common ground between ourselves and other intelligent entities about which we can know nothing with absolute certainty.…

A spacefaring species could easily settle the entire Milky Way given billions of years. Yet the fact is that there is no obvious one in our solar system right now. The supposed inconsistency…

One of the greatest debates in the long history of astronomy has been that of exceptionalism versus mediocrity—and one of the great satisfactions of modern times has been watching…

Philip Marcus, you might say, is obsessed with the solar system’s most famous storm. The computational physicist and professor in the mechanical engineering department at the University…

Is our planet unique? The chances are slim. There are trillions of other galaxies, each of which has billions of suns. In a recent interview, Ed Young, a professor of geochemistry…

Leading off this week’s chapter of Nautilus, physics writer Michael Brooks carries on a playful, imaginary conversation with Jerome Cardano, a crazy-bold 16th-century scientist,…

I have seen the future of space exploration, and it looks like a cue ball covered with brown scribbles. I am talking about Europa, the 1,940-mile-wide, nearly white, and exceedingly…

Sarah Stewart is living her ideal life—and it just got sweeter. The University of California, Davis planetary physicist recently won a MacArthur Foundation Fellowship, famously and…

It seemed inevitable that Elon Musk would eventually get into a Twitter war over whether Mars can be terraformed. When you’re on Twitter, he told Businessweek in July, you’re “in…

On the Saturday afternoon of July 4, 2015, NASA’s New Horizons Pluto mission leader Alan Stern was in his office near the project Mission Control Center, working, when his cell phone…