Humanity has already flung machines into interstellar space, but sending people is a different problem entirely. The physics ...

For more than a century, popular culture has promised that humanity will spread effortlessly across the Solar System, turning ...

Let's begin with your great-great-great-etc.-grandparents. I'm talking eight or nine of those "greats," meaning your ancestors living around the first decades of the 1800s. Here is what I want you to ...

In 1949, famed mathematician and physicist John von Neumann delivered a series of addresses at the University of Illinois, where he introduced the concept of the "universal constructor." The theory ...