Ancient history

Not just by land

Despite the lack of archaeological evidence, even some Polynesian navigators may have reached the southern shores of the New World as experienced navigators able to make such a crossing:those who support this possibility thus explain the presence of the sweet potato , originally from South America , in the islands of Polynesia .
On the other hand, the recent findings suggest in the Californian Channel Islands of Santa Rosa and San Miguel , of stone spearheads intended for marine hunting (which reveal a more refined workmanship than those of Clovis ) And crescent-shaped artifacts, used for close hunting of birds.
According to the anthropologist John M. Erlandson of the University of Oregon and colleague Torben C. Rick of the Southern Methodist University of Dallas , at the end of the last ice age the sea level along California was seventy meters lower than today , enough to allow navigation.
Since the Channel Islands more than ten kilometers from the coast, the ancient Americans necessarily had to have boats capable of plowing those troubled waters.
That these ancestors came from distant lands is also believed by the anthropologist Todd Braje of Humboldt State University of the California , assuming that the spearheads found in the Channel Islands they are incredibly similar to artifacts found in Japan (in a site dating back to 17,000 BC) and on the Russian peninsula of Kamchatka (along the banks of a river, dating back to 15,000 BC). The hypothesis is that that historical period may have been characterized by migratory waves from Japan and Russia towards the American continent, not only with the land bridges of the Bering Strait but also with navigation along the coasts .