| Title | Comment | Keywords |
|---|---|---|
| Land Bridges | 17:58 - 18:26 (00:28) / 0.6 MB | "Ice Age", "land bridge", "sea level", coastline, landmass, Asia, "North American Continent", animal, humans, continent, migration |
Coastal & Marine Geology InfoBank
USGS CMG InfoBank Geology School: land bridge |
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