Mechanisms of Range Expansion
{"Image DocumentName": "Mechanisms of Range Expansion", "Image ImageDescription": "Secular migration \u2013 takes hundreds of generations so that species evolve en route. Northward expansion of eastern hemlock (Tsuga canadensis) after the last ice age took thousands of years. North American horses and camels. Hippidion one-toed horse. Ancestral camel Poebrotherium.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}