2007-3015 at http://pubs.usgs.gov/fs/2007/3015/ for ages of geologictime periods. Ages in the spiral have been rounded from the age estimates in the Fact Sheet
2007-3015 at http://pubs.usgs.gov/fs/2007/3015/ for ages of geologictime periods. Ages in the spiral have been rounded from the age estimates in the Fact Sheet
climate change, disaster mitigation, fighting forest fires, and improving real-time agricultural processes. These investigations of our Earth System not only