Homes curved into high sandstone escarpments, intricate animist paintings on deep cliff walls, a people practising elaborate traditional rituals centuries old: an ancient heritage which became a focus of academic study and a prized destination for international travel, but now in danger from intolerance and strife.Related StoriesEgyptians hold giant rallies denouncing Islamist President Mohammed MorsiVideo: Thousands of crocodiles escape from farmTwitter suspends account of Islamic militants al-ShabaabRAF sends spy jet to aid Mali actionA revolution betrayed? Two years after Mubarak, Tahrir ... Read More