Ever wondered if we are not alone in the universe?
As this truly nerdgasmic crash-course by Robert A. Freitas Jr speculates, the scope for alien life could be positively astronomical. Via xenology.info:
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Xenology is the study of all aspects of life, intelligence, and civilization indigenous to environments other than Earth. Over the last three decades xenology has advanced rapidly on many fronts. Biochemists have studied the origin of life on this planet, knowing that if they can duplicate the major early steps of “abiogenesis” in the laboratory then the evolution of alien life is a very likely – maybe inevitable – event. NASA biologists have spent much time developing sophisticated life detection instruments such as the miniature biochemical automated test laboratories carried to Mars by Viking in 1976. There is growing interest in SETI, the Search for Extraterrestrial Intelligence, in which radio scientists look for powerful transmissions or leakage radiation from advanced extraterrestrial supercivilizations.