Petra, a 2,500-year-old city in Jordan, is one of the world’s most revered cultural sites. But time and tourism are taking their toll on its monuments, carved into sandstone cliffs. Chemistry professor Talal Akasheh, who has devoted 26 years to documenting Petra scientifically, is set to complete a knowledge system that will underpin the city’s future conservation.
the year Petra was added to UNESCO's World Heritage List
the number of monuments and features in Petra's Geographic Information System by 2008
the age, in years, of Petra, the city that Talal is documenting