Do you think something's out there--a creature from another planet, perhaps? Read about those who encountered something strange and lived to tell the tale--or disappeared forever. Return to Roswell, New Mexico, half a century after an alien spaceship supposedly crashed there. Was it a UFO or just military experiments? Then move on and examine reports of other possible alien encounters, such as: * the fiery blast over the Tunguska region of Siberia--meteorite,...