-Simon
Simon Laub
www.simonlaub.net
What we have seen sofar is that there are many interconnected strands to modern human behaviour, ranging from our enhanced mind reading talents, symbolism, artistic and musical expression, to rituals and religion [p. 137].According to Stringer, many different changes play together to make us human.
The art of making fire....is probably the greatest (discovery), excepting language, ever made by man.Campfires provided warmth and protection. And a social focus as people sat to talk, sing and dance, around the flames.
Research suggests that the optimal conditions for rapid cultural changes are those where there are large groups of interacting ''social learners''...Having minds that can be guided by inner speech (Guiding thinking patterns and decision making), and minds that are capable of mental time travel (integrating working memory with prospective memory, dealing with near future tasks) would obviously also be better at mind reading and social cooperation than minds without these features [p. 208].
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Applying that conclusion to early humans, such as Neanderthals and modern humans, would imply that the populations who progressed the most culturally were not necessarily the most intelligent or skilful, but those who were best able to network and pass on learning in large groups.
Archaic humans, like Neanderthals, might have had some of these brain mechanism, but might have lacked the full brain integration that modern humans had developed. Mechanism that were essential for the much larger social networks of modern humans.Population sizes are also quite important.
Population sizes in Africa could have reached a critical threshold about 100.000 years ago, when population density and enhanced contact between groups could have allowed the rate of innovations to overtake their loss, something probably rare in humans up to that time.Competition (for resources and mates) within groups would also be necessary to drive things forward. Stringer notes that ''the development of religion may have provided an important means of maintaing a balance (in the group)'' [p. 221].
We are predominantly of recent African origin.What a book, what a story!
The pre-eminence of Africa in the story of modern humans was a question of its larger geographical and human population size, which gave greater opportunities for morphological and behavioural variations, and for innovations to develop and be conserved, rather than the result of a special evolutionary pathway.
-Simon
Simon Laub
www.simonlaub.net
In september, Augustine Kong of Decode Genetics in Reykjavik, Iceland, and colleagues published a ground breaking study:Where, most geneticists and palaeoantropologists now seem comfortable with a revised figure of 7 to 8 million years (?) Some, however, go as as far back as 13 million years for the split between us and our closest living relatives.
After scanning the genomes of 78 children and their parents to count the number of new mutations in each childs genome, they found that every child carries and average of 36 new mutations (Nature, vol 488, p. 471).
Crucially, that is half what was previously assumed, meaning that the molecular clock ticks more slowly than we thought. Pushing e.g. the human - chimp split further back in time.
The molecular clock has been used to to date a number of key events, not least when our ancestors left Africa.Well, well - I simply refuse to change the dates in my Steps video once again :-)
Which has been estimated by looking at genetic differences between the Yoruba people of Nigeria and Europeans and Asians...
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Earlier genetic estimates of the Out of Africa Exodus suggested this happened 50.000 years ago. So, when fossil remains in Israel and archaeological sites in India were found to be 100.000 old, there was some explaining to do.
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The new molecular clock resolves the discrepancy, pushing the departure back to between 90.000 and 130.000 years ago.
-Simon
Simon Laub
www.simonlaub.net
Modern humans in Europe did not get their pallid complexion from the Neanderthals, but only lost the darker skins of their African ancestors perhaps just 11000 years ago, long after Neanderthals had died out.According to Sandra Beleza from the University of Porto in Portugal:
There is a clear correlation between latitude and skin pigmentation - people who have spent an extended period of time at higher latitudes have adapted to those conditions by losing the skin pigmentation that is common at lower latitudes.Beleza and her colleagues studied three genes associated with lighter skin pigmentation (genes that are found in all human populations, but are far more common in Europe than in Africa, and explains a significant portion of the skin-colour differences between Africans and Europeans).
By analysing the genomes of 50 people with European ancestry and 70 people with sub-Saharan African ancestry, Beleza's team could estimate when the three genes and pale skin first became prevalent in European populations.So, modern humans did not lose their dark skins immediately on reaching Europe [4] ...
The result suggested that the three genes associated with paler skin swept through the European population only 11,000 to 19,000 years ago.
-Simon
Simon Laub
www.simonlaub.net
In 2010 a young man is brought to a danish hospital. His symptoms are quite bad.Which, certainly, makes you wonder: Could this actually be true or is it just an urban legend.
Apparently, he suffers from abdominal pain, shortness of breath and has a very severe condition of high blood pressure. It turns out that he has attempted suicide, by emptying a glass of pills, he had standing in his bathroom.
The doctors try to help him, but nothing works and his condition worsen. The doctors then examine the bottle of pills from his home. It turns out that he has been participating in a drug trial, so the doctors contact the company behind the trial. The company informs the doctors that the patient had been part of a control group that had received calcium tablets ... placebo.
When the patient is informed of this, he immediately feels better. And his condition goes from being critical to normal within a quater of an hour.
- Thoughts about good experiences.Apparently, our coping mechanisms are not all that unique.
- Thoughts about things that we are looking forward to.
- Thoughts about good things in our own personalities.
- Thoughts about things we are good at.
- Thoughts about people, animals, situations or things that we like.
- Thoughts about things that are important to us.
- Thoughts about beautiful places or things we meet in our everyday life.
-Simon
Simon Laub
www.simonlaub.net
-Simon
Simon Laub
www.simonlaub.net
Learning is a game, you grow a garden of memory. Memories begin life as seeds, you nurture them in your greenhouse, and then harvest them to your garden.PeoplePerHour (Getting anything done), simply, sounds like a very obvious way to recruit people (in the future).
Tinkercad is the easiest way to do and learn 3D design on the web. Join the buzzing community and discover 3D printing.also sounds quite awesome....
-Simon
Simon Laub
www.simonlaub.net