WEBVTT FILE 1 00:00:00.020 --> 00:00:04.100 2 00:00:04.100 --> 00:00:08.230 Understanding how fast glaciers are moving 3 00:00:08.230 --> 00:00:12.400 gives clues to how the climate is changing. 4 00:00:12.400 --> 00:00:16.440 5 00:00:16.440 --> 00:00:20.620 Landsat-8’s advanced imaging system lets scientists 6 00:00:20.620 --> 00:00:24.680 compare small movements in the ice. 7 00:00:24.680 --> 00:00:28.710 8 00:00:28.710 --> 00:00:32.840 Software tracks bumps or grooves in the ice to see how the texture changes. 9 00:00:32.840 --> 00:00:36.860 10 00:00:36.860 --> 00:00:40.880 Comparing ice movement around the world helps scientists identify trends 11 00:00:40.880 --> 00:00:47.390 and predict how much ice might flow into the ocean. 12 00:00:47.390 --> 00:00:51.218