"Harvard's top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star"--

The Day the Universe Changed presents a sweeping view of the history of science, technology, and human civilization and examines the moments in history when a change in knowledge radically altered man's understanding of himself and the world around him. James Burke examines eight periods in history when our view of the world shifted dramatically: In the eleventh century, when extraordinary discoveries were made by Spanish crusaders. In fourteenth-century...

"Do all questions have answers? How much can we know about the world? Is there such a thing as an ultimate truth? To be human is to want to know, to understand our origins and the meaning of our lives. In The Island of Knowledge, physicist Marcelo Gleiser traces our search for answers to the most fundamental questions of existence, the origin of the universe, the nature of reality, and the limits of knowledge. In so doing, he reaches a provocative...