ALL Humans Descended From African Hunter-Gatherers 50,000 Years Ago? 

"I see this as the biggest challenge to the hypothesis" Not really and let me explain why. There's been genetic testing on modern day Aborigines of Australia and they to like everyone else, came be traced back to Africa. Homo Sapiens as you may know are at least 300,000 years old. Over the course of thousands of years, there were many migrations Out of Africa into different parts of the world but many of those populations died off. It's very possible, one of these early migrations Out of Africa, made it to Australia a long time ago but that population went extinct. Thus why their remains would be there but their DNA would be completely absent from modern day Aborigines people because they don't come from that extinct population but from the Homo sapiens who arrived in Australia 60 to 50 thousand years ago.

To say that paleo-human has a single location origin, single family origin has a Hebrew Literature pre-concept.

@@yonatancruz2761 its not even close to the same thing.

@@ashelywilliams1718 - I'm well aware that all Homo sapiens originate from Africa. What I was talking about was the hypothesis that all modern humans are descended from several bands in Africa who existed around 50,000 years ago, not 300,000 years ago. I said "There are various possible hypotheses to explain this apparent discrepancy. From the possibility that if humans were present in Australia 60K years ago, that they weren't actually the ancestors of later Australian indigenous peoples, who were all descended from later arrivals." However, that is as I say, only a hypothesis, as is the hypothesis that all modern humans are descended from several bands of hunter-gatherers who lived in Africa around 50,000 years ago. Another possible explanation is that the hypothesis that that all modern humans are descended from several bands of hunter-gatherers living in Africa around 50,000 years ago, may be incorrect. Over the last 40 years ago I have seen many hypotheses about our human ancestors fall by the wayside, causing a complete re-appraisal of the evidence. This is not really surprising, given that there is limited remains from the time, and one single new find, often results in a complete re-evaluation of everything. The fact that all modern day indigenous people in Australia "be traced back to Africa", is hardly surprising given they are all Homo sapiens, which is thought to have first arisen in Africa, nearly 300,000 years ago. The question is whether those people are descended from, or are partly descended, from people who arrived in Australia, more than 50,000 years ago. Various assumptions are made about the rate of mutations in DNA, which is how these estimates are arrived at. It is all based on various levels of probability. It is not deterministic. Often new discoveries are made, which cause those previous assumptions to be re-evaluated. I am not asserting anything, just noting that we cannot be certain about this. Let me give an example. There has been much debate about when humans first arrived in the Americas. Last year a new study was published, that seems to confirm that human footprints in New Mexico, have been dated to "23,000 to 21,000 years ago". Completely over-turning the hypotheses, that humans only first arrived in the Americas, far more recently than that.

@@stephenbarlow2493 "I'm well aware that all homo sapiens originate from Africa" That's Awesome 👍. "What I was talking about with a hypothesis that all modern humans are descended from several bands in Africa who existed around 50,000 years ago" What? So you believe we all migrated from Africa but you disagree with the age of when this event took place? Are you not aware that there were several migrations out-of-africa during different time periods? Isn't it likely one of these early migrations making it to Australia and dieing off because how else can you explain the lack of any of their dna in modern-day Aborigines people? Just wondering, what makes you believe we all come from Africa? What facts made you come to that conclusion. Because how would you be okay with those facts but not okay with the facts that show that we all come from Africa 50,000 years ago? Like I stated before modern-day Aborigines people have been genetically tested and the test show that their people arrived in Australia from Africa 50 to 60 thousand years ago. So why you're still confused on that is interesting.

Thank you 🙂 i have lots more on the channel

Michael Cremo. Prove him wrong

Big fat theory!

​@@SHREDTILLDEAD Humans can't have existed for multiple millions of years because early humans struggled hard with predation until we invented tools to defend ourselves better with, even if you make the argument that no bones would've survived by chance, which is a poor argument since I mean just look at this video there's plenty of bones found, rock definitely survives and so we wouldnt have trouble dating that to multiple millions of years. Then you could argue "well couldnt those older tools have been made by modern humans" but we know that they weren't, since we were making complex modified tools with the best material we could find, where earlier tool users such as homo habilis or erectus or heidelbergensis just used whatever source was closest and least time consuming to get, even if they wouldve been able to tell the difference between good and poor quality stone.

Thank you 🤗

@@HistoryWithKayleigh Ur THEORY is ful of Horseshit..U are a CRO-MAGNON and Ur People Never Turned White from Black..Africans are 3.5mil yrs to Date..Ur history is only 7thousand yrs old 😉

​@@HistoryWithKayleighAre you a historian or anthropologist?

Always 🤗

Thank you!

Very well thought out idea. Very plausible as well.

20,000 years ago, the Sahara plains were still a savanna, and the current Eurasian steppes were occupied by the ancestors of all non-Blacks (other than Australian Aborigines and South India Pre-Dravidians, who just kept the pigment levels).

@@Egilhelmson yes please help us out?

@@hughmaseko9780 that is obviously a plowed boy or loaf creeper seeing mud peepole as a threat.

Considering the population is at an all time high, but the three most populous countries on the planet aren’t even at war, idk

If you are enjoying Kayleigh’s videos, have you considered becoming a channel member or Patreon. Every little bit helps.

It was his work that got me to really question out of Africa. Never really mattered to me.

I definitely think Humans at some point in their evolution had a closer affinity to the ocean than in "recorded history" Our ability to automatically change some physiological actions on entry to water, our subcutaneous fat not found on other great apes, our hairlessness, our nearly fully evolved but not quite, transition to bipedalism wheras Quadropedalism is far better on the savannah where supposedly "we" evolved and also our brains weird make up adaption and growth, way beyond what is required for life in the supposed enviroment we evolved and mastered for a long long time.

@@walterblanc9708 at the present to the earliest archeology and history humans have always lived within 300 miles of the Ocean. The earliest cities all developed in deltas and fresh water lakes.

But, DHA can be synthesized from alpha linoleic acid from plant sources

That the DHA fat in our brains may have come from eating lots of sea food in past generations is food for thought.

No she doesn’t she uses the racist card for anyone that disagrees with her, that’s a shortcut to thinking and totally unprofessional. She has some fooled.

Thank you John!

Thank you!

Thank you 🤗

Virtually all DNA samples of African populations are taken from living individuals. It is not necessary to have ancient DNA to study ancient humans. DNA is fragile in any environment out side of a cell The question about the age of our species (Homo sapiens sapiens) is not one that is in doubt. It is the time period in which the earliest hominins that can definitely be identified as our forerunners which is obscure. For example, the fossils from Morocco are not H.s.sapiens, but an archaic form which pre dates our species.

@@peterleadley This cab driver fully appreciates your answer Mr. Leadley.

@@garyworokevich2524 Thank you. I hasten to point out that my comment is in no way pro or anti cab driver (I deplore cabism) No matter if it be a black, white or maroon cab, they all share a common ancestry! Ubers and mini cabs are another matter.

It's been answered many times. 250,000-300,000 years.

@@Spectre-wd9dl that would be the origin of H.sapiens, but the modern population is descended from individuals that migrated out of Africa some 50-80k years ago.

But the Nature study that this video is based on just came out this year. It doesn't get more recent than that right? Just saying Lol. Another paper but this time from Oxford University just came out this year as well here recently. Google this title: University of Oxford researchers create largest ever human family tree: Researchers from the University of Oxford’s Big Data Institute have taken a major step towards mapping the entirety of genetic relationships among humans: a single genealogy that traces the ancestry of all of us. Here's a direct quote from the researchers "After adding location data on these sample genomes, the authors used the network to estimate where the predicted common ancestors had lived. The results successfully recaptured key events in human evolutionary history, including the migration out of Africa". So here we have two papers from (2022) from two different genetic studies from two different science journals. Showing through genetic evidence the African origins of modern human beings and we are just suppose to go off this paper from 2020? That sounds backwards. And unless they debunked Y chromosome adam, something they did not do. All modern human beings are living descendants of him and he originated in Africa. That is still considered a scientific fact. Which makes sense, since the oldest physical remains of homo sapiens have been found in Africa. Morocco to be exact.

Out of africa theory is laughable these days.

@@JonathanErwin I never bought that theory, either. That every human was a genetic relative of "Lucy", it just didn't seem plausible.

Homo sapiens first used it 300,000 years ago, as i mentioned in my video

@@HistoryWithKayleigh You're on the ball! Quick response. But do you still maintain Morocco is the original 'birthplace' of our species?? By it's very nature DNA CAN describe ancient populations. Just because some populations die out, doesn't mean their DNA is lost. e.g. there are no more Neanderthals, but their DNA is still present to some degree in most of the population today. DNA has been extracted from a human fossil that dates to 18,000 years ago. (Sawchuk, 2010-Tanzania)

I do, until they find older remains 🙂

@@HistoryWithKayleigh That flies in the face of accepted (mainstream) paleo anthropological theory.

Do other predators live in peace with each other? Big cats, primates, wild dogs, bears, wolves? Unfortunately Humans- past, present and future will continue to kill each other....

@@larryc1616 yeah Lets start replacing all male leaders by female ones. I bet we have less war. Its always the males who seek a fight.

@@Kees247 Girls fight all the time, more then men. I used to work the doors of a nightclub for over 30 years. Broke up more fights with women than I have men. They can be very vicious, much more than men. If women ruled the world then our whole civilization would of nuked itself many years ago.

@@larryc1616 yes but, we don't have to. supposedly, we are far above the other predators, therefore, we should be far more "civilized". but, instead of rising above our natural instincts, we have just developed more "civilized" ways of killing each other. who knows, maybe someday.

Thanks Scott!

They don't necessarily need to be descendants, they could've interbred with a descendant and therefore share the genes

@net gnostic. There's been a lot of genetic testing done on modern day Aborigines of Australia and they to like everyone else, can be traced back to Africa.

@@ashelywilliams1718 what genetic evidence shows Aborigines can be traced to Africans? You have been lied to.

@@ashelywilliams1718 Agreed.

@@HistoryWithKayleigh That would still be descendency, I would say. Since I am European, I imagine I have a couple of percent Neanderthal genes, which would prove I am a descendant of Neanderthals, amongst others.

I put my sources in the description as always 🙂

Modern humans have been around between 100k to 300k years. Most of us carry 3% of Neanderthal DNA or Denisovan DNA. You are in the right place. Look up Kayleigh's videos on the subject.

Your bigger worry are those that want everyone to believe we all descended from Jack and Jill 5,000 years ago.

@@HistoryWithKayleigh as I said. Hope your research can be to my benefit in the further debate with people :)

@@aaronaragon7838 I know we carry around between 1-4% Neantherthal dna. But that only shows our ancestors fornicated with other races and about 44.000 years ago or in that era of coexistence. But awesome to hear im only about 100k years off with my theory :D

Hahaah

Sources?

There has never been a nation, culture or community of people lasting 50,000 years. Nice try.

I still gave a thumbs up, and am subscribed, because at least you're trying to do something, unlike a lot of the lazy people who do nothing!

@@HistoryWithKayleigh Expand your reading selection. It's all there. Start with 'The legend of Gilgamesh'.

@@woodspirit98 We're talking humanity ... not nations, culture or community. Focus. Critical reading/listening is a good start for you.

Yes! Definitely watch some more of Kayleigh’s videos. She always displays the enthusiasm and passion.

@@MadaraUchiha-cq9hb I think I remember reading some time in the last 20 years or so, that there were 4 reoccurring "faces" in women today. That there is some m.DNA that can be drawn down to these four groups. (But also, That you could group some 100+ women into four groups who would all have the same facial features.) I can't remember where I read this, nor the title of the report. (Sometimes you can read too much and everything is just stuffed in there with no room to breathe). Anyways, did a quick Google and it might be tied to similar book & papers such as: "The Seven Daughters of Eve" - Bryan Sykes "Gene tests show that two fifths of Ashkenazi Jews are descended from four women" - Judy Siegel-Itzkovich "8,000 Years Ago, 17 Women Reproduced For Every One Man" - Francie Diep

Tbh it's likely space exploration, if we ever get to it before killing ourselves off, will be done by robots and AI. We squishy bags of meat and fat are just too fragile to boldly go where no one has gone before. Bones and muscles waste away rapidly in zero G, retinas get torn up by cosmic rays, and frankly the cheap bastards who pay for the rockets don't want to pay for the safety features human spaceflight requires.

The Toba eruption more than likely wiped 99% of sapiens off the globe, as we lived along the coasts near river mouths. Every single example of sapiens found pre-Younger Dryas was found within a days walk of a modern coastline. Sapiens evolved along the band that stretches from Iberia (Canaries/Azores) to Indonesia. The groups that migrated down the eastern coast of Africa were among those that survived. Those that were in the archipelago of the Indian Ocean all died. This is why our genetics show us as coming out of Africa, when in reality the true remnants of sapien origins are under 300' of Toba ash.

Thank you for making this comment.

Ashley Williams . Yes , All begin in Africa

Bottlenecking.. Like the neck of a bottle that narrows..

@@jacobjones5269 there was a theory put out about 20 to 30 years ago around the last ice age but don’t quote me on it where humans where nearly wiped out as a species. We where supposed to have been reduced in number’s to somewhere from as low as 3000 to as high as 5000 now keep in mind, that was globally. To put that in perspective, that would be living in a town of maybe 500 where you knew everyone to where your your global neighbors would have been several 1000’s of miles away. To put in perspective London to Rome in Europe or in the America’s New York to say Los Angeles ( over 3000 miles) to find a new mate let alone new people to trade with. Genetic bottle necklace on a global scale.

Barton i am a high school dropout, i create these videos because i am extremely passionate about ancient history

@@HistoryWithKayleigh Far out!

@@bartonabrams3433 I was just trying to explain the term bottleneck, since you misspelled it originally.. That was obviously a typo since it’s obvious you understand the term.. Just trying to help.. Cheers..

@f no one said that interbreeding didn't occur. It just seems like everyone living on the planet today shares the genes with these 3 populations. That isn't too much of a stretch.

@Loke.. More evidence is always great but how much more do you need? Every modern human so far that's been tested in Asia or Oceania, have all shown they like everyone else can be traced back to Africa. Ancient remains found in those areas, show the exact same Out of Africa event. So thus I ask again, how much more proof do you need?

@@ashelywilliams1718 The proof for out of Africa is extensive, but the proof that the first waves before 50 000 years left no descendants require more evidence. That would for instance mean that the original aboriginals in Australia all died out and were replaced with a later migration but there isn't really a huge gap in the archaeological record. I am certainly not contesting that Homo Sapiens first evolved in Africa, we have plenty of evidence for that. We are not 100% sure where Neanderthals and Denisovans come from but likely Europe and Asia even if middle east is a possibility for at least the Neanderthals as well. But the new theory basically say that every human alive today comes from 3 tribes 50 000 years ago and I think that require extensive research.

Or interbred with descendants of them, therefore everyone shares their genes

@@HistoryWithKayleigh That certainly does make more sense. I retract my statements then, I think I slightly misunderstood the theory. If just some genes comes from the 50 000 population things get pretty plausible because a small population being isolated for 50 000 years seems unlikely and the inbreeding of such population would be Habsburg bad.

Do you have any facts as to why it's incorrect? Because the oldest physical remains of homosapiens are in Africa and our oldest genetic lineages are in Africa.

​@@ashelywilliams1718 Do some research on "ghost species DNA" in Sub-Saharan Africans. The oldest human DNA is in Asia, or perhaps a Spanish cave dated 400,000 years ago. But not in Africa.

@@rickfarwell4110 Okay. There was a "ghost population". Okay, how is that debunking anything? Find me a quote from a real geneticist that states: "because of this ghost population, it debunks the Out of Africa Theory". I'll help you out here, it doesn't exist. Our oldest homosapien genetic lineages are in Asia? Great, prove it. You can't just state something and walk away. Show the facts, the genetic scientific journals you got this information from.

@@ashelywilliams1718 Oldest DNA. look it up. OK.

I agree.

Let this sink in, there is more genetic diversity among humans in Africa than all of the rest of the world. It blows my mind to think about it.

Racism is nothing more than hating your own ancestry. Racial purity is a lie born of ignorance and fear, and the hatred they foster. There is only one race. The Human Race. And if you're religious, we are ALL the children of God, whatever name you use.

@@MemphiStig I don't know what country you live in. Where I live we have this thing called equal rights and somehow we have to fill in various forms, of how we see ourselves I have never liked this and always answered human being, to which the answer comes back you can't answer in that way. And secondly I'm very proud of my parents. If you have a problem with this the fault is yours not mine. As for a God existing, from what the various religious groups say doesn't exist in my view.

@@Brodricktucker Idk how you completely misunderstood everything I said. But you did it completely. Congratulations.

@@MemphiStig as that is your perception. It means nothing to me.