最近的地质证据表明，早在16,000年前，沿海岸的大部分地区就没有冰了，这与人们过去的看法相反。
Recent geologic evidence indicates that contrary to what had been believed, substantial areas along the coast were free of ice as early as 16,000 years ago.
太平洋海岸图片。被认为有250多岁，孤单的柏树涌现来自岩石沿海岸的鹅卵石海滩，加利福尼亚州。
Thought to be around 250 years old, Lone Cypress Tree springs out of rock along the coast in Pebble Beach, California.
越来越多的人支持这样一种理论，即移民发生得要早得多，是沿着阿拉斯加沿海路线，沿西北海岸而下通过海路进行的。
There is growing support for the theory that migration took place much earlier, by sea, following a coastal route along Alaska and down the northwest coast.
应用推荐