From the cover of our new book "Overview Timelapse". The Occidental Glacier is located in the Southern Patagonian Ice Field of Chile. In this image from May 2019, massive icebergs and an ice mélange fill the lake at the toe of the glacier. Recent measurements of the Patagonian ice fields (taken using satellite photography) show that they have been receding and thinning at an accelerating rate in recent years. Between 2002 and 2017, the ice shrank by roughly 23 gigatons per year—a volume of water equivalent to roughly ten Olympic-size swimming pools.