Ovserv ca iti place sa jignesti si sa faci pe grozava. Sa raspunzi de n ori, punctual, cu aceleasi teorii preferate - dar numai la intrebarile pe care le vrei tu, fix ca un copil rasfatat. Am cel putin 5 intrebari pe care le-ai ignorat complet in ultimele 2 zile.
Te simti mai bine atunci cand jignesti si se observa. Dar, hei, esti ,,literata': in ale stiintei si pentru tine interpretarea unui text metaforic inseamna sa torturezi cuvintele pana urla de durere.
An'way, intrebarea nu era la misto punctual, incerca sa iti aduca aminte ca anumite teorii sunt doar teorii si au muuulte scapari la interval.
,,In that view, 40,000 years ago was the turning point in human creativity, when modern Homo sapiens arrived in Europe and left the first unambiguous artifacts of abstract and symbolic thought. They were making more advanced tools, burying their dead with ceremony and expressing a new kind of self-awareness with beads and pendants for body ornamentation and in finely wrought figurines of the female form. As time passed, they projected on cave walls something of their lives and minds in splendid paintings of deer, horses and wild bulls.
As an explanation for this apparently abrupt flowering of creativity, Dr. Klein has proposed a neurological hypothesis. About 50,000 years ago, he contends, a chance genetic mutation in effect rewired the brain in some critical way, possibly allowing for a significant advance in speech. The origin of human speech is another of evolution's mysteries. Improved communications at this time, in his view, could have enabled people ''to conceive and model complex natural and social circumstances'' and thus give them ''the fully modern ability to invent and manipulate culture.''
Although this transformation, with the genetic change leading to the behavioral change, occurred in Africa, Dr. Klein writes, it allowed ''human populations to colonize new and challenging environments.''
sursa : https://mobile.nytimes.com/2002/02/26/science/when-humans-became-human.html?referer=https://www.google.ro/
Apoi:
''There is no reliable evidence of modern humans elsewhere in the Old World until 60,000-40,000 years ago, during a short temperate period in the midst of the last ice age.''
Unde apare si modelul de 200.000 de ani pe care il arunci tu, desi ei doar ,propun'', proposes, da? Ca de aia se numeste TEORIE si de aia inca se contrazic cu mare fast arheologii lumii.
,,The replacement model of Christopher Stringer and Peter Andrews proposes that modern humans evolved from archaic humans 200,000-150,000 years ago only in Africa and then some of them migrated into the rest of the Old World replacing all of the Neandertals and other late archaic humans beginning around 60,000-40,000 years ago or somewhat earlier. If this interpretation of the fossil record is correct, all people today share a relatively modern African ancestry.
''If this interpretation of the fossil record is correct, all people today share a relatively modern African ancestry. All other lines of humans that had descended from Homo erectus presumably became extinct. From this view, the regional anatomical differences that we now see among humans are recent developments--evolving mostly in the last 40,000 years. This hypothesis is also referred to as the "out of Africa", "Noah's ark", and "African replacement" model.
sursa: https://www2.palomar.edu/anthro/homo2/mod_homo_4.htm
Interesant e cum am ,,evoluat'' la inaltime, de sus in jos, ca sa o luam iar in sus.
40,000 years ago: European males – 183 cm (6 feet). Cro-Magnon people were the first modern humans (Homo sapiens) to inhabit Europe. These hunter-gatherers lived a physically demanding lifestyle that would have required greater body strength than the average human today. Their recent African ancestry may have also affected their height, as tall, long-limbed builds are useful adaptations to the warmer African climate.
10,000 years ago: European males – 162.5cm (5 ft 4 inches). A dramatic reduction in the size of humans occurred at this time. Many scientists think that this reduction was influenced by global climatic change and the adoption of agriculture. Agricultural communities suffered from malnutrition as a result of failed crops and a more restricted diet. Furthermore, a close association with domestic livestock introduced new diseases into human populations.
600 years ago: European males – 165 cm (5 ft 5 inches). Poor diet and health were the main causes for the shorter stature at this time.
Today: European males – 175 cm (5ft 9 inches). There has been an increase in height over the last few hundred years. In part, this increase is due to improved diet and health care. There may also be a genetic link as industrial expansion and urbanisation has brought together genetically isolated people and reduced the impacts of inbreeding due to a greater mixing of populations and their genes.''
Se propune si pentru asta un sistem intreg de cauze :
,,The factors that affect body size are complex. They involve interactions between genetics, environment and lifestyle practices such as diet and technology.''
In timp ce :
,,Our brains now average about 100-150 cubic centimetres less than when our species first appeared.
100,000 years ago: average brain size: 1500cc
12,000 years ago: average brain size: 1450cc
Today: average brain size: 1350cc''
Insa, atentie, nu se stie daca nu cumva peste zeci de ani creierul nu va incepe sa creasca din nou.
Inca ceva interesant, though:
,,Physical characteristics such as skin and eye colour, hair type and colour and body shape are determined by genetics, but can also be influenced by the environment. Over long periods of time, the environment will act on the genes to develop particular characteristics within a population.''
Deci, ba e gena de vina, ba sunt ,,transformarile fizice evidente si #accelerate# din ultimii ani, privocate de divrrse accidente genetice si/sau medii diverse de dezvoltare''.
Cam greu sa tragi asa usor o concluzie din atatea ipoteze PrOPUSE,da?
Ce te faci daca peste zeci de mii de ani vom semana mai degraba cu stramosii nostri? O vei numi evolutie de contrasens?
sursa:
https://australianmuseum.net.au/how-have-we-changed-since-our-species-first-appeared
Pe fondul epocii glaciare, daca respecti atat de mult stiinta, madama, de ce nu te apleci mai mult asupra raportului de asa zisa evolutie vs ADAPTARE.
Or adaptarea la medii climatice, tetrstre si sociale ( tehnologii, ocupatii , etc - ca nu am chef sa dezvolt pana maine) si cu dublu sens in transformarile fizice nu are nici in clin nici in maneca cu teoria exclusivista a evolutionistilor. Sa ne intelegem.