Rapid evolution: Can mutations explain historical events? (John Hawks at CASW 2009)
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- čas přidán 2. 11. 2009
- We usually think of evolution occurring over millions of years. But modern humans changed their environment 10,000 years ago with the development of agriculture and the decline of nomadic life. And theyve been evolving very rapidly ever since. Genes for lighter skin, for example, are new and increasing in Europeans and Asians. Genes related to hearing are evolving very rapidly as well, possibly demonstrating that humans are adapting to language-or to the different sounds needed in particular languages. Genes that increase a populations fitness could lead to greater population growth, spread, and clashes with neighbors-as when populations north of Italy swept into territory once part of the Roman Empire. John Hawks is also comparing modern human DNA to the Neandertal genome, just now becoming available for study, to find out which mutations distinguish us from these very close relatives.
John Hawks, Ph.D. - Assistant Professor of Anthropology - University of Wisconsin, Madison
John Hawks' studies include trying to make sense of genetic fragments from different populations, and anthropological bone and tooth specimens, to show how humans have evolved during the past 30,000 years. And he attempts to integrate that knowledge with data from archeology and the historical record.
johnhawks.net/weblog
I love how clearly this guy explains things.
A great lecture (even if it is 100 years old) buggered by crackling volume.
Great great great talk John. Now I'm looking to find your slides.
wbn The slides for this talk are available here: casw.org/sites/default/files/Hawks_CASW2009.pdf
@@CRIresearch no slides here . . .
Here's some evolution:
When I was growing up on Williamson Creek just south of Austin, it was a paradise.
Wildlife everywhere, good clean water and air, the sky was clear and bathed in stars at night, the flora was unmatched.
Now there is very little wildlife, no good water or air, no dark skies at night, no stars and what grows is just a shadow of what it once was.
What was once a paradise is now pavement, parking lots, stores and housing developments and our ranch taken away by eminent domain.
Indeed!
Do u remember the HUGE CLOUDS OF BIRDS EVERY DAY...now if u see 20 together its.RARE...YES TEXAS HAS BEEN RUINED...TOTALLY RUINED..ALL.CITI3S ARE.DEMONRST.HELL HOLES WITH GANG ILLEGAL SHOOTOUTS NIGHTLY...AND NOW AT MALLS..
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What a wonderful talk. Thanks for sharing this.
This was very interesting.
This dude is a god he made my life make sense he doesn’t mention the conspiracies behind all these one video here had me sucking in knowledge like not just his vids I’m takin good throwing out crap thanks for the enlighted
Interesting stuff about that gene in asia about some part of the hairs in the ears? And yes, a good hypothesis is about adaptation of language... but we really don't know... could've been for hearing if a tiger was near by etc... who knows... And yeah, brains could be shrinking because we don't need to store as much info in our memory. We now store everything in paper or computers for everyone to access. Maybe there is some relation between written language and the size of the brain? my regards
I'd always assumed the royal hemophilia was Factor 8.
Think of how much human have evolved in the past 500 years, extrapolate that to tens of thousands of years and it becomes mind blowing how far we've come.
What evolution. All I see is genocide with the rest going on with life. Catastrophes and depopulation then repopulation.
Perhaps the area related to survival, decline?
Brain shrinkage could be down to our abandonment of night and distance vision as well as massive downgrades in our hearing range, our sense of smell. The growth of language and communication made us more efficient in our survival struggles, no more need for our Super Senses, we replaced them with teamwork. It gave our Brains a bit of 'Breathing Space' to rewire and become more efficient in their workings. This also left a portion of our brain free to explore the abstract, hence the development of Art, Music, Philosophy etc.
Could be our brain is shrinking as the Influence of our our archaic cousins big brain genes becomes less and less active in the 'Human Pool' . Our histories hint that 'we' wiped out the last of our cousins, a crime we may be paying for now, as we fall further and further down the bottleneck and back to a Homo Erectus without the super senses.
pre-industrial/pre-literate humans had prodigious memories.
@@TheShootist hmm what's your source for this?
@Jackie, what do you mean by ‘bottleneck’? What bottleneck?
there are 82 millions in germany
Czar Nicholas ii was not descended from Victoria.
Hawks didn't say so - Tsarina Alexandra was a granddaughter of Victoria
Queen Victoria and Prince Albert were cousins! That is the reason there was Himophil..and porphil... In their gene pool. George lll was highly allergic to chlorophyll and he also sop here'd from mental illness. Commons also married close relatives. Perhaps that is the reason for extra chromosomes...Columbia SA has a village 40 mi from Bogota where all the people in the village are related to each other, and most of the have dementia...
The audio in this is horrible. It's only 10 years old (as of 2019), so I'm guessing it's from a smart phone?
@ avenue pad
Your not considering how statistical data can scientifically be used to prove correlation of how something can effect an out come. If you disregard this, then you shouldn't believe any statistical data at all.
Brain shrinkage? Well, I like the Woodley theory that we have been losing general intelligence 'G' by 1 point per decade since around 1850. This is masked by a rise in specialised intelligence but it's G that is the important thing. This loss can be explained by our overcoming of Darwinian selection i.e. effectiveness of medicine and nourishment etc allows spiteful mutations to multiply.
Abstractacus
No, encephalization was rampant in the last million years for us, and the more final form of the brain for a given species doesn't have to be as large as the initial transitional forms to do the same job or better. This is true of all sudden climate driven transitions. We achieved our brain size only in the last 300,000 years, a VERY short time for such a change. Future humans, once our form has settled a bit, will have somewhat smaller AND SMARTER brains than we do now. Our children still have to pare down their neuronal connections to learn and grow. We will gradually evolve to grow up sooner and need less of that brain reduction to grow and learn. This happens in all initial transitional processes.
Gene entropy causes deterioration of the whole genome. Natural selection slows the deterioration. Modern medicine and nutrition hastens the deterioration.
@@Mdebacle
There is NO such thing as "gene entropy". That's a stupid creationist trope with zero evidence. They want to make it seem like there really was a "The Fall" and that mutations are all deleterious, when we now know totally otherwise. Natural Selection is constantly correcting and improving the genome by killing off defective forms. Life itself is reverse-entropic. Modern medicine and nutrition has zero to do with it. You're an uneducated shithead.
“Specialized Intelligence” ... what do you mean by that?
@@FsimulatorX That factor of intelligence which is more specialised rather than generalised. Look it up!
So, 30,000 years ago we were genetically closer to chimps than modern humans by a factor of at least 4. Imagine what we would be today, if not for agriculture. I'm picturing the Native Americans, before the arrival of the European.
Native Americans practiced agriculture...
Ms. Lass. Really not interested in your thesis for theology school.
Population of Germany is 83 million..
I think humans must be evolving towards psychopathy.
we have definitely gotten dumber since widespread reading n writing.
The average ancient greek/those with solely oral traditions would now be seen as a genius due their superior memory. what you dont use, you lose
we are finding this has happened again since the internet era in that concentration spans have shrunk