lcdguy

"Sixty-six million years ago, an object the size of a city descended from space to crash into Earth, creating a devastating cataclysm that killed off the dinosaurs, along with three-quarters of the other species on the planet. What was its origin?...

"The award-winning Caltech physicist and author of The Particle at the End of the Universe shares sweeping perspectives into how human purpose and meaning naturally fit into a scientific worldview, "--Amazon.com.