The 12th Planet
“In many ways, modern man—Homo sapiens—is a stranger to Earth. Ever since Charles Darwin shocked the scholars and theologians of his time with the evidence of evolution, life on Earth has been traced through Man and the primates, mammals, and vertebrates, and backward through ever-lower life forms to the point, billions of years ago, at which life is presumed to have begun. But having reached these beginnings and having begun to contemplate the probabilities of life elsewhere in our solar system... and beyond, the scholars have become uneasy about life on Earth: Somehow, it does not belong here. If it began through a series of spontaneous chemical reactions, why does life on Earth have but a single source, and not a multitude of chance sources? And why does all living matter on Earth contain too little of the chemical elements that abound on Earth, and too much of those that are rare on our planet? Was life, then, imported to Earth from elsewhere? Man's position in the evolutionary chain has compounded the puzzle.MoreLess
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