Fifty years ago, U.S. scientists launched a satellite that dramatically changed how we see the world.
The making of ghost forestsSatellites that scan the same areas year after year can be crucial for spotting changes in hard-to-reach regions. They can monitor snow and ice cover, and, along U.S. Atlantic coast, dying wetland forests.
These eerie landscapes of dead, often bleached-white tree trunks have earned the nickname"ghost forests.", an ecologist now at the University of Waterloo in Ontario, used Landsat data to spot wetland changes. She then zoomed in with high-resolution images from Google Earth — which includes Landsat images — to confirm that they were ghost forests. within the Alligator River National Wildlife Refuge [in North Carolina] was lost over the past 35 years.
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