M. Sanjayan's Seven Wonders

The broadcaster and senior scientist for Conservation International talks to Samantha Weinberg about saving nature and living better, on a round-the-world journey from Sri Lanka to Montana From INTELLIGENT LIFE magazine, July/August 2015 WORK OF ART Hand axe from East AfricaIf you walk in the Rift Valley and keep your eyes down, especially around an ancient lake bed, you may see teardrops of stone.