REYNALDO CHARRIER has explored the fossil history entombed in the Chilean Andes for the past 20 years. Charrier is professor of geology at the University of Chile in Santiago.

• 沙利尔探索智利安地斯山区的化石历史，至今已逾20年。沙利尔是智利圣地牙哥市的智利大学地质学教授。