Correspondence to Philip Alexander Coles, Performance and Medicine, San Antonio Spurs, 1 Spurs lane, San Antonio, Texas 78240, USA; pcoles{at}attcenter.com The first building block in the injury ...

In the heart of the jungle, surrounded by lush vegetation, lies one of the major sites of Mayan civilization, inhabited from the 6th century B.C. to the 10th century A.D. The ceremonial centre ...

This sacred site was one of the greatest Mayan centres of the Yucatán peninsula. Throughout its nearly 1,000-year history, different peoples have left their mark on the city. The Maya and Toltec ...