送交者: cornbug 于 2005-2-12, 17:44:46:
的白令海陆地确实存在过。这是我的猜测：可能爱斯基摩人(ESKIMO)和印第安人都是从亚洲过去的。
For years, scientists envisioned the Bering land bridge as a dry grassland where mammoths and bison grazed, attracting hungry humans who may have migrated back and forth between what is now Alaska and Siberia.
A new study suggests the land bridge instead looked remarkably similar to the tundra hills and plains of today's arctic Alaska. In the same study, Scott Elias, of the University of Colorado in Boulder, and his coworkers also found evidence that the land bridge was open for travel much more recently than previously thought. Elias's study was featured in the July 4, 1996, issue of Nature.
The Bering land bridge, thought by some scientists to be the pathway for the ancestors of all the Native people of North and South America, was a chunk of land more than twice the size of Texas, Elias said. He believes the entire west coast of Alaska was landlocked, from north of Barrow all the way south to the Aleutian chain.