1 00:00:00,000 --> 00:00:04,637 Six things you don't know about snow 2 00:00:06,072 --> 00:00:12,078 #1: Snow covers 30 percent of land on Earth. 3 00:00:14,447 --> 00:00:19,252 #2: More than 1.2 billion people rely on water from snowpack and glaciers. 4 00:00:22,422 --> 00:00:28,528 #3: Snowmelt is the main source of water for 60 million Americans. 5 00:00:29,863 --> 00:00:35,602 #4: Since 1967, 1 million square miles of spring snow cover has disappeared from the Northern Hemisphere. 6 00:00:36,336 --> 00:00:43,576 #5: 70 percent of water from the snow-fed San Joaquin River irrigates California's Central Valley. 7 00:00:45,678 --> 00:00:52,385 #6: NASA's Global Precipitation Measurement mission observes falling snow, even at the top of hurricanes. 8 00:00:54,220 --> 00:00:58,491 snow.nasa.gov