Professor Witten is a leading light of superstring theory and the only physicist to have won the vaunted Fields Medal, mathematics’ highest honor. Known for advancing a number of novel approaches in mathematics and physics, Witten opened up new vistas in 1995 when he unified five seemingly competing superstring theories into M-theory, which seeks to unify Einstein’s general theory of relativity with quantum mechanics.

For every cell in your body, there’s another tiny single-celled creature that also calls your body home. Far from being germs we should eradicate, these ancient friends allow us to …

Are we alone in this vast universe? Some think that’s highly unlikely. With new technologies joining the search, NASA estimates we’ll find definitive evidence of aliens within 20 to 30 …

Making sure the parachute deploys exactly on time and lands rovers safely on Mars is in the hands of NASA engineer Michael Meacham. Check out the experiments he conducts on …

Can the spooky world of quantum physics explain bird navigation, photosynthesis and even our delicate sense of smell? Clues are mounting that the rules governing the subatomic realm may play an unexpectedly pivotal role in the visible world.

Why do stories endure across centuries—and what do they reveal about the essence of being human? Brian Greene sits down with Booker Prize–winning author Ian McEwan to explore the timeless …