Scientists have known that spring is arriving earlier across the U.S. because of climate change. Now, you can take a look at new maps from the U.S. Geological Survey to see how early spring is arriving where you live. Jake Weltzin is an ecologist with the USGS, and the executive director of the National Phenology Network. "The folks down in the southeastern United States, across much of that region, are seeing spring coming as many as three weeks early this year," he says. In Michigan, early