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Figure 1. During the last ice age (top) sea level was at least 120 m lower than it is today (bottom), exposing much more area on the continents. In these topographical maps, you can see the many changes that took place as sea level rose, among them the disappearance of the land bridge from Siberia to Alaska, the appearance of Britain and the islands of Southeast Asia, and the filling of the Hudson Bay. Another good image can be found here. Image credit: National Geophysical Data Center (NGDC) at NOAA..
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