Stone carvings from an ancient mountain "observatory" in Turkey may confirm the date of a devastating comet which is thought to have smashed into earth nearly 13,000 years ago, archaeologists believe. Researchers from the University of Edinburgh studying etchings of animals at the Gobekli Tepe stone structure in southern Turkey say they correspond with star patterns during the 10,950 BC summer solstice. According to their study, the images on a pillar known as the "Vulture Stone" provide compelling evidence that the ancient rock tells an astrological story, and is a "date stamp" of a "cometary encounter" that is rumored to have changed the planet's climate thousands of years ago. The "Younger Dryas" event is a historical moment when the temperature in the northern hemisphere took a sudden nose dive. Theories for why the