The First Americans
A question that everyone has always wondered but never truly questioned is, how were Americans first populated? Through recent DNA analysis questions are slowly being answered. A few studies have discovered genetic traces of human populations in places such as Australia and islands that surround it, but the only problem was that scientists could not find genetic affinity with Australasians in the ancient DNA of Native Americans from Mexico of Patagonia. The first study said that North and South America may have been peopled by a diverse set of founding populations, which offered the Austrailian signal as a type of evidence that humans could have arrived in the Americas in different pulses. On the other hand, another study stated that people crossed into North America via the Bering land bridge in a single wave about 20,000 years ago. There have been various questions involving this topic and a lot of different theories. Some theories included what is called the Paleoamerican hypothesis, which says that the first people to arrive in South America arrived from Polynesia, Melanesia, and Australasia and suggested that the Australasian signal in the DNA of modern Amazonians living in Brazil could of helping with a hint to human migration in the Americas.
On the other hand, what was most focused on was determining when populations in Serbia and East Asia has last shared a common ancestor with Native Americans. Scientists had believed it was about 23,000 years ago. In conclusion, they had said it had been peopled by a single wave of migration of people in Siberia who crossed the Bering land bridge and proceeded south. In opinion, the concept should be more researched since the topic is still so broad. It is true and knowledge that we know a little information about the topic, yet we still cannot come down to a conclusion even after months of research. I feel like if we look into more DNA analysis from other countries and more into North American soil, we will discover a lot more information.
Link to article:
http://www.the-scientist.com/?articles.view/articleNo/43069/title/What-s-Old-Is-New-Again/Link to alternative article:
http://csfa.tamu.edu/who.php
On the other hand, what was most focused on was determining when populations in Serbia and East Asia has last shared a common ancestor with Native Americans. Scientists had believed it was about 23,000 years ago. In conclusion, they had said it had been peopled by a single wave of migration of people in Siberia who crossed the Bering land bridge and proceeded south. In opinion, the concept should be more researched since the topic is still so broad. It is true and knowledge that we know a little information about the topic, yet we still cannot come down to a conclusion even after months of research. I feel like if we look into more DNA analysis from other countries and more into North American soil, we will discover a lot more information.
Link to article:
http://www.the-scientist.com/?articles.view/articleNo/43069/title/What-s-Old-Is-New-Again/Link to alternative article:
http://csfa.tamu.edu/who.php
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