Earth is dotted with humongous, human-made structures that, to an alien eye, may be tell-tale signs of intelligent goings-on.

DC Comics has given readers the most powerful superheroes and supervillains in comics, starting all the way back at the ...

Astronomers have discovered that jets from a cannibalistic black hole are erupting with the power of 10,000 suns.

Scientists reveal how waves behave on alien planets, from towering methane seas on Titan to nearly still lava oceans on ...

Kyle Rayner tracks intergalactic prison escapees in L.A. in Green Lantern #34, featuring alien wrestling and a time-bending ...