Scientists in the UK have dated a set of footprints found in 1961 in the Chihuahuan desert in northeastern Mexico helping us understand the climate conditions in this area more than 7,000 years ago. The footprints were excavated while workman were building a road and placed in the Museo del Desierto in Saltillo, Coahuila. The age of the footprints peeked the interest of researchers at the John Moores University in Liverpool. In 2006 their curiosity yielded a second set of prints in a Cuatro Ciénegas quarry.