This video says about itself:
New World’s Oldest Human Skeleton Found in Mexico
16 May 2014
Scientists have found what they believe is the oldest nearly complete, genetically intact human skeleton in the Americas within a flooded cave in Mexico’s Yucatán Peninsula.
From Science:
16 May 2014
Paleoanthropology
Bones From a Watery ‘Black Hole’ Confirm First American Origins
Michael Balter
Most researchers agree that the earliest Americans came over from Asia via the Bering Strait between Siberia and Alaska, beginning at least 15,000 years ago. But many have long puzzled over findings that some of the earliest known skeletons—with long skulls and prominent foreheads—do not resemble today’s Native Americans, who tend to have rounder skulls and flatter faces. Some have even suggested that at least two migrations into the Americas were involved, one earlier and one later.
But the discovery of a nearly 13,000-year-old teenage girl in an underwater cave in Mexico’s Yucatán Peninsula argues against that hypothesis. The girl had the skull features of older skeletons, but the genetic profile of some of today’s Native Americans—suggesting that the anatomical differences were the result of evolutionary changes after the first Americans left Asia, rather than evidence of separate ancestry.
Also from Science:
Late Pleistocene Human Skeleton and mtDNA Link Paleoamericans and Modern Native Americans
Abstract
Because of differences in craniofacial morphology and dentition between the earliest American skeletons and modern Native Americans, separate origins have been postulated for them, despite genetic evidence to the contrary. We describe a near-complete human skeleton with an intact cranium and preserved DNA found with extinct fauna in a submerged cave on Mexico’s Yucatan Peninsula. This skeleton dates to between 13,000 and 12,000 calendar years ago and has Paleoamerican craniofacial characteristics and a Beringian-derived mitochondrial DNA (mtDNA) haplogroup (D1). Thus, the differences between Paleoamericans and Native Americans probably resulted from in situ evolution rather than separate ancestry.
Art objects created by North American peoples of the Paleoindian period (approximately 18,000 to 8,000 BCE), have been found at the Gault Archaeological Site, which is located about 50 miles north of Austin, Texas. The new methods used by archaeologists to identify the objects, employing sophisticated computerized scanning and analysis, suggest that such objects may actually be more common in North America than previously believed: here.
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Dear Kitty. Some blog 
It’s interesting why this debate is so hotly contested, but good to have some apparently solid evidence. Personally, I’m surprised that Americas were inhabited so ‘late’ given paleolithic man’s proclivities to roam across the frozen wastes of the ‘old’ world.
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Yes, but humans, being of African origin, probably preferred warmer regions than the Bering Strait region. And they had to wait till there was a temporary land bridge, ships not having been invented yet.
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Yes, indeed. Have not checked how ancient are the human finds on the Russian side of the Bering Strait. Actually I would not put it past Paleolithic man to have invented some sort of sailing device.
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According to this source, the origin of sailing is later than the Paleolithic:
“Ships and vessels are the oldest means of transport, looking at the history of sailing. The first ship remnants dating back to 2900 BC are a testimony to this. The Egyptians built big ships with at least 40 oars and the mast was distinctively designed to support the big sail. Some suitable innovations turned these ships into war-ships. The sailing history reveals that it has played a major role in the development of civilization. The man had not only greater mobility and capacity for fishing, but also made progress in trade and warfare.
It was in the late 5th millennium BC that the earliest illustration of a ship under sail on a painted disc found in Kuwait.”
http://www.rainbowsailingschool.com/tracing-the-history-of-sailing-back.html
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Oh yes, I don’t doubt the historical data to date. Just know that as a one-time archaeology student, archaeologists construct ‘realities’ from the small remains of otherwise lost evidence; this coupled often with a Darwinian approach to human culture i.e. that it evolves in a linear way. I always remember when I was studying the Inuit, a small community ended up on an isolated island complex where there was no wherewithal to mend their boats, and so in time they forgot how to make them. Later someone invented blow-up seal-skins, and used them to paddle around the Arctic seas riding on the backs of same to do their hunting. Made me think never to underestimate human ingenuity. Also in terms of human development, the paleolithic wasn’t that long ago, and their creative skills, admittedly over a fairly limited range of artifacts – flutes, figurines and throwing sticks, was fairly sophisticated. And so that’s why I think there might be a possibility of an earlier occupation of the Americas – i.e. I wouldn’t want to rule it out.
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Maybe, some earlier traces of sailing ships will yet be found indeed.
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Excellent post. Thank you for sharing
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My pleasure 🙂
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