CARTA Presents The Origins of Today's Humans - Tim Weaver: The Evolution of the Human Skull

[@MeatPopsycle]

There is some awesome content on this channel.

[@joel4225]

Very nice to throw these on in the morning! Thanks carta

[@Q_QQ_Q]

best youtube channel . most underrated .

[@TheDeadlyDan]

I take issue with the idea of domestication as a recent idea. Hybridization of various plants and animals into today's agricultural staples may be only ten thousand years old, but the idea of management goes much further back. Cypres and Crete both show some indications that present day agriculture was being practiced as early as 50kya. Australia was colonized - by boat - 60kya and aboriginals began almost immediately to begin forest and game management. Each tribe is 'responsible' for their area's management and continent wide, when English arrived, there wasn't a bit of Australia that wasn't "farmed". American natives were managing forests and game continent wide as well. Because it doesn't fit our 'modern' ideas of farming doesn't mean it wasn't managed with every bit of intention. The "true" reason our skull has changed through drift is the over arm throw. We're the only hominin that can do this, and we're the only hominin - the ONLY animal - that kills at distance. Our entire body anatomy lends itself to this activity. Our behavior has changed along those lines, and we're still the ony animal that kills at distance - we just use atomic spears now. Distance killing is the only thing that Sapiens does that nothing else can do, and it began with the over arm throw.

[@johnkallsen6356]

Thank Carta for leaving some time for YOU!

[@hiyacynthia]

Great presentation , loved the graphics and took screenshots, great speaker. Will be following Dr Weavers work. Sort of disappointed our perfect skulls are just due to chance, but these theories are always changing!

[@tonywestbrook9876]

This is the kind of science people are missing when they watch an Ancient Alien episode, and hear about Nephilim and such. Moreover, this is even more interesting. Considering, the power of Genetic Drift, diet and time to shape our image.

[@haffoc]

and yet this notion that the shift to agriculture caused changes in the human skull does not explain why modern humans have a skull wildly different from others in the genus. Which was I thought was the question initially posed in this talk.

[@larryparis925]

Thank you!

[@rocroc]

989k Subs, 12,510 views, 33 comments??? It seems to me we know for certain that climate and diet had a huge impact on every species of hominid and is especially demonstrated when comparing Neanderthals to Sapiens. We also know that brain size shrunk when we shifted from hunter gatherer to agriculture. Myself, I tend to believe there was genetic change (drift?) that caused us to think more creatively than other species and our predecessors. When climatic conditions changed as a result of geology, natural disasters, glaciation and the corresponding change in tidal currents, wind, etc., our superior skills and more creative thinking won out. Our migrations were not the only ones. Homo erectus and others migrated to most every corner of the contiguous world. Ours was just the most successful. In reality there have been only a small number of fossils to help us shape our history. Someday we may find more definitive answers. While I enjoyed this presentation, I think the graphics could have been improved. I am not sure I agree either with the timing of change?

[@larryparis925]

Informative presentation. If I understood correctly, genetic drift in combination with adaptive radiation to local ecological conditions and the resulting diets gave rise to differences in cranial and mandible morphologies.

[@fredriks5090]

Hit a brick wall and your knuckles will harden. Hit a brick wall your entire life and your whole arm will harden as well. Base your society on hitting brick walls and your group will select for more resilient bones/wound regen based on who can hit it more while surviving/staying happy. Create a religion around hitting a brick wall and the God will be the fist that broke the wall. Eventually - your group will evolve into brick-wall-destroyers.

[@mikeharrison1868]

Thanks!

[@Mishn0]

1: Is the "hard vs soft" diet difference one of "wild vs cultivated" or is it "raw vs cooked"? 2: Is there any effect of "nature vs nurture" on the morphology of the skull in populations? That's sort of a question about the "hard vs soft" again, if the same individual was raised on a soft diet, would that result in a different skull morphology than if that very same individual were raised on a hard diet. Think identical twins raised from birth, one only eating the hard diet and the other soft. Would their adult skulls show measurable differences in these morphologies you've studied?

[@monus782]

17:57 I guess that's also why phrenology is pure nonsense

[@dwightehowell8179]

One of the things needed for significant amounts of evolution is generational time. Comparing Mesolithic and recent farmers isn't allowing for much generational time. On the other hand studies have shown that Ancient Athenians had more robust bodies with greater athletic potential than current people living in the same region. In general I'd say go for at least a few thousand years to allow significant change to occur.

[@ShunkUp]

Fascinating that random drift plays a role. I do wonder if the cranium traits that are more selected for like EQ (encephalization quotient) increased Cerebellum mass, or basicranial flexure are outside the range for random drift.

[@stefcui007]

Why has there been no appreciable difference in human skulls, either by size or shape, after humans mated with Neanderthals and Denisovans? There should be anatomical changes in the human after 50% gene sharing with anatomically different humans. Humans skeletons should demonstrate a before and after from what we looked like before interbreeding and after interbreeding. Love to hear your opinion.

[@danmaster9183]

Genetic variations within a certain species is not evolution, it just means no one is exactly the same... We havent changed in 200k years, slight difference between individuals within a species is not "changing/evolution"

[@4youp]

Hmm yes, kind of

[@alittleofeverything4190]

I wonder who disliked this video. See comments below.

[@tobiasbjornson2124]

Perhaps lecturers should uh study a bit of um, public speaking?

[@keefdavis244]

Religion makes more sense, when you add a little Science to it.

[@allistairneil8968]

Good thing this guy wasn't around with the phrenologists in Nazi Germany...

[@brianhale3678]

How do you get to hell? Very simple: claim that you're innocent. How do you get to heaven? Very simple: Admit that you're not Innocent, you're guilty and ask for mercy. How to know if you're guilty or not? Simply: Compare your life to the Ten Commandments God gave you in the Bible. Everyone agrees that if people followed the ten commandments there would be no need for governments or police. Do not lie. Do not steal. Do not commit adultery. Do not insult God by using his name as a cuss word. There are six more but let's just leave it at that. How many lies have you told in your life? Have you ever taken anything that didn't belong to you? Jesus said, if you look at a women lustfully you've already committed adultery in your heart with that woman. How many times a day do you do that? Do you use God's name as a cuss word? Would you do that with your own mother's name? If you answer these questions honestly you know that you're guilty. God can justly punish you and send you to hell. Ask him for mercy. His name is Jesus. It's as simple as this, The Ten Commandments are called the moral law. You and I broke God's laws. Jesus paid the fine. The fine is death. Ezekiel 18:20 - "The soul who sins shall die. That's why Jesus had to die on the cross for our sins. This is why God is able to give us Mercy. Option A You die for your own sins Option B Ask for mercy and accept that Jesus died for you

[@slfanta]

Don't see the point of doing such researches,,