"We live in an extraordinary age," writes Carl Sagan, one of our leading astronomers. "As long as there have been human beings, we have posed dep and fundamental questions on the origins of consciousness; life on our planet; the beginnings of the Earth; the origins of the Sun; the possibility of intelligent beings somewhere up there, as well as the grandest inquiry of all, the advent, nature and ultimate destiny of the universe.

ISBN: 394501691