The idea that there might be other worlds has existed for centuries, and it lies inside ghost and fairy stories as well as more complex, science-based ideas, li

There was a time when 'universe' meant all there is. Everything. Yet, as Brian Greene's extraordinary book shows, ours may be just one universe among many, like

INSTANT NEW YORK TIMES BESTSELLER As you read these words, copies of you are being created. Sean Carroll, theoretical physicist and one of this world’s most c

In recent decades, scientific theories have postulated the existence of many universes beyond our own. The details and implications of these theories are hotly

How did a single "genesis event" create billions of galaxies, black holes, stars and planets? How did atoms assemble -- here on earth, and perhaps on other worl