Underwater exploration seeks evidence of early Americans
100-200 miles off the coast of St. Petersburg, Florida in the Gulf of Mexico is now 300 feet below water, but it is believed that human occupants once lived there.
“The decision to take their expedition underwater in the first place, Adovasio said, stems from the premise that early Americans probably hugged the American coastline, congregating around freshwater rivers, before heading inland. At that time, much of the world’s water was confined to glaciers, causing ocean levels to be lower and exposing more of the continental shelf. As the earth warmed and water levels rose, evidence of past settlements became submerged.
Dredging and storms have turned up artifacts on the Gulf Coast as well as the Atlantic and Pacific coastlines, but Adovasio said this is the first time a group of scientists has staked out a submerged piece of real estate suspected of containing preserved Ice Age beaches and systematically gone in search of early human occupations.”
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Archeological evidence of human activity found beneath Lake Huron
Yet again more evidence of how much American history has been hidden beneath water.
More than 100 feet deep in Lake Huron, on a wide stoney ridge that 9,000 years ago was a land bridge, University of Michigan researchers have found the first archeological evidence of human activity preserved beneath the Great Lakes. …Without the archeological sites from this intermediate time period, you can’t tell how they got from point A to point B, or Paleo-Indian to Archaic,” O’Shea said. “This is why the discovery of sites preserved beneath the lakes is so significant.
Perhaps more exciting than the hunting structures themselves is the hope they bring that intact settlements are preserved on the lake bottom. These settlements could contain organic artifacts that deteriorate in drier, acidic soils on land.
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Native Americans descended from a single ancestral group, DNA study confirms:
DNA evidence shows that Native Americans and Greenlanders are more closely related to each other than to any other existing Asian populations, except those that live at the very edge of the Bering Strait.
“For two decades, researchers have been using a growing volume of genetic data to debate whether ancestors of Native Americans emigrated to the New World in one wave or successive waves, or from one ancestral Asian population or a number of different populations.Now, after painstakingly comparing DNA samples from people in dozens of modern-day Native American and Eurasian groups, an international team of scientists thinks it can put the matter to rest: Virtually without exception the new evidence supports the single ancestral population theory… The study is published in the May issue of the journal Molecular Biology and Evolution.
The team’s work follows up on earlier studies by several of its members who found a unique variant (an allele) of a genetic marker in the DNA of modern-day Native American people. Dubbed the “9-repeat allele,” the variant (which does not have a biological function), occurred in all of the 41 populations that they sampled from Alaska to the southern tip of Chile, as well as in Inuit from Greenland and the Chukchi and Koryak people native to the Asian (western) side of the Bering Strait. Yet this allele was absent in all 54 of the Eurasian, African and Oceanian groups the team sampled.”
Princeton geoscientist offers new evidence that meteorite did not wipe out dinosaurs
Geologist Gerta Keller admits that the layers of iridium so frequently referenced in regards to the dinosaur mass extinction was in fact from a meteor. However, due to the study since 1984 of plant materials and sediments of the region of proposed impact she argues that this didn’t cause the extinction.
“Keller suggests that the massive volcanic eruptions at the Deccan Traps in India may be responsible for the extinction, releasing massive amounts of dust and gases that could have blocked sunlight, altered climate and caused acid rain. The fact that the Chicxulub impact seems to have had no effect on biota, she said, despite its 6-mile-in-diameter size, indicates that even large asteroid impacts may not be as deadly as imagined.”
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Evidence of Clovis-Age Comets
The theory is that a comet impact about 12,900 years ago caused mass extinction of many species in North America, this includes the Clovis peoples. These articles don’t mention that many Anthropologists believe people inhabited America much prior to this, but they do discuss that this may have destroyed the Clovis culture. This needs to be studied further.
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Researchers, led by University of Oregon archaeologist, find pre-Clovis human DNA
Evidence doesn’t conclusively say that these people were the ancestors of the Clovis peoples before migrating south and east, but nonetheless it is an important discovery that adds more evidence that the “clovis-first” theory was wrong.
“DNA from dried human excrement recovered from Oregon’s Paisley Caves is the oldest found yet in the New World — dating to 14,300 years ago, some 1,200 years before Clovis culture…“Had the human coprolites at the Paisley Caves not been analyzed for DNA and subjected to rigorous dating methodology,” he added, “the pre-Clovis age of the artifacts recovered with the megafaunal remains could not have been conclusively proven. In other words, the pre-Clovis-aged component of this site could very well have been missed or dismissed by archaeologists.”
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