Dark matter may be invisible, but scientists are getting closer to understanding whether it follows the same rules as ...

At the turn of the century, it sounded as if string theory could give us big answers about the universe. Well… has it?

Ars Technica: The Voyager Golden Record is perhaps the best known example of humans attempting to communicate with an alien species, spearheaded by the late Carl Sagan, among others. But what are the ...