See how an Alaskan glacier has shrunk over time
47 years of satellite images capture the Columbia glacier’s retreat
![Columbia glacier](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/12/120919_cg_ice-in-motion_feat.jpg?fit=1028%2C579&ssl=1)
Alaska’s Columbia glacier has retreated rapidly over the last four decades. This false-color image was taken in July 2014.
NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey