Previously unknown human population boom revealed by DNA: Massive expansion occurred 40,000 years ago
- Scientists guess that baby boom occurred as our ancestors adapted to life away from the coasts
By Damien Gayle
DNA sequencing has revealed a previously unknown human population boom between 40,000 and 50,000 years ago, a new study claims.
The sequencing of the Y chromosomes from 36 men has revealed a ten-fold increase in the number of genetic markers nearly 20,000 years after our ancestors first left Africa.
Scientists believe the expansion could have occurred as our ancestors adapted to more rugged environments, allowing them to spread inland from coastal areas.
Baby boom: New analysis of DNA has revealed a previously unknown human population explosion between 40,000 and 50,000 years ago
‘We have always considered the expansion of humans out of Africa as being the largest population expansion of modern humans, but our research questions this theory,’ said Wei Wei of the West China University of Medical Sciences.
‘The out-of-Africa expansion, which happened approximately 60,000 years ago, was extremely large in geographical terms with humans spreading around the globe.
‘Now we’ve found a second wave of expansion that is much larger in terms of human population growth and occurred over a very short period, somewhere between 40,000 to 50,000 years ago.’
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Bigfoot is real. That’s according to a group of Colorado researchers who say they have hard evidence proving its existence.
Researcher Dave Paulides is convinced the reality of Bigfoot isn’t as fuzzy as the photos from people who claim to have seen the mythological creature.
“This DNA is like nothing else in the world,” Paulides said.
Paulides says Bigfoot looks approximately 7 to 8 feet tall and weighs in at a whopping 800 to 1,000 pounds.
“It’s easy to say a lot of things are crazy. If you lived underground your whole life, the belief that 400 people could fly in a plane would sound crazy,” Paulides said.
Paulides says his research group has collected hundreds of samples of DNA evidence. He focused his search in Northern California’s redwoods. He says strands of hair are from a Sasquatch, genetically tested to reveal a previously unknown species.
Not a single research institution in the country has confirmed the DNA test results, but Paulides says there are thousands of sightings a year, from California to Tennessee, including dozens in Colorado.
“Colorado Parks and Wildlife does not currently list ‘Sasquatch,’ ‘Yeti,’ ‘Bigfoot,’ ‘The Abominable Snowman,’ or ‘Harry’ (of ‘Harry and the Hendersons’) as any of the more than 900 diverse species that are native to Colorado,” the organization said in a statement.
“I think that the government probably is aware of the subject, but it’s difficult to give acknowledgement to something that they obviously can’t control,” Paulides said.
Paulides says he’s surprised more people haven’t seen Bigfoot. He believes there could be as many as 50,000 in the wilderness.
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A genetic researcher is saying that Bigfoot DNA assessments establish that the furry creature actually does exist. Dr. Melba S. Ketchum states she and her staff sequenced about three complete Sasquatch nuclear genomes and concluded the species is a human hybrid — a mosaic of human and novel non-human aspects. Their conclusions have still to go peer evaluation.
Dr. Melba S. Ketchum of Nacogdoches, founder of DNA Diagnostics Inc. in the eastern Texas town of Timpson, said she and her crew expended 5 several years on their research of purported Bigfoot hair and determined they have validated the existence of a hominin hybrid Pertinent Answers/Firms species, the famous creature frequently acknowledged as “Bigfoot” or “Sasquatch,” residing in North The usa.
There have been recurrent-but-unsubstantiated claims of Bigfoot sightings additional than the a long time, which include some grainy film clips.
In a release posted on the company’s Web internet site Saturday, the scientists say their DNA sequencing suggests the animal is a human relative that created about 15,000 several years back as a hybrid cross of present day Homo sapiens with an not known primate species.
Ketchum mentioned her team has sequenced three whole Sasquatch nuclear genomes and concluded the species is a human hybrid.
“Our examine has sequenced 20 comprehensive mitochondrial genomes and utilized up coming generation sequencing to obtain a few whole nuclear genomes from purported Sasquatch samples,” she claimed in the release. “The genome sequencing shows that Sasquatch mtDNA is identical to present day working day Homo sapiens, but Sasquatch nuDNA is a novel, mysterious hominin suitable to Homo sapiens and other primate species.
“Our facts Associated Items/Firms point out that the North American Sasquatch is a hybrid species, the final result of males of an unknown hominin species crossing with female Homo sapiens.”
Genetic testing has by now dominated out Homo neanderthalis and the Denisova hominin as contributors to Sasquatch mtDNA or nuDNA, she talked about.
“The male progenitor that contributed the not known sequence to this hybrid is special as its DNA is additional distantly removed from humans than other these days identified hominins like the Denisovan particular person,” Ketchum said.
“Sasquatch nuclear DNA is extremely novel and not at all what we experienced anticipated. Even although it has human nuclear DNA inside its genome, there are also distinctly non-human, non-archaic hominin, and non-ape sequences. We identify it as a mosaic of human and novel non-human sequence.”
She mentioned even far more take a look at is vital to “outstanding characterize and have an understanding of Sasquatch nuclear DNA.”
Ketchum, who describes herself as a veterinarian with 27 numerous a long time realistic experience in genetics investigation, which include forensics, needs general public officers and law enforcement to realize the Sasquatch as an indigenous folks today.
“Genetically, the Sasquatch are a human hybrid with unambiguously modern-day-day human maternal ancestry,” she mentioned. “Government at all quantities have to understand them as an indigenous men and women today and right absent guard their human and constitutional rights in the direction of men and women who would see in their bodily and cultural distinctions a ‘license’ to hunt, entice or get rid of them.”
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