Preparing for Contact investigates the prospect of extraterrestrial life and the consequences of both direct and indirect contact from a variety of perspectives, including the fields of astronomy, astrobiology, SETI (Search for Extraterrestrial Intelligence), and Ufology and what they can tell us about our place in the cosmos. Some people insist that there is strong evidence that aliens have already visited Earth, and perhaps even seeded our planet with the building blocks of life eons ago. Over the past few decades, numerous seemingly credible persons, including high-ranking military officers, government officials, and airline pilots claim to have had encounters with exotic aircraft not attributable to any known source on Earth. Are we alone? Some scientists are skeptical of the notion of advanced alien civilizations. Other observers cite the sheer multitude of galaxies and stars as favoring the plurality of life in the universe. Why should our planet be so exceptional?