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Evolución. Científicos recrean por primera vez el paso de organismos unicelulares a pluricelulares.

Evolución. Científicos recrean por primera vez el paso de organismos unicelulares a pluricelulares. | Aux origines | Scoop.it

Han conseguido observar cómo organismos unicelulares se transforman en grupos pluricelulares, el proceso primordial para la aparición de plantas y animales, incluido el ser humano.

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Aux origines
Aux origines de l'univers de la vie et de l'humanité...
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Des pochoirs vieux de 40 000 ans découverts en Indonésie

Des pochoirs vieux de 40 000 ans découverts en Indonésie | Aux origines | Scoop.it
Ces dessins seraient ainsi les contemporains des plus anciennes œuvres rupestres connues du monde, situées en Europe.
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The Mysteries of the Coddu Vecchiu Tombs of Giants

The Mysteries of the Coddu Vecchiu Tombs of Giants | Aux origines | Scoop.it
During the Bronze Age (3300 – 700 BC), the Nuragic civilization built what are known as the Tombs of Giants (Tomba dei Gigantic). These megalithic gallery graves were used by the Nuragic people
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L’homme de 45 000 ans

Gène par gène, le portrait de l’humanité se précise. La reconstitution partielle du génome d’un Homo sapiens vieux de 45 000 ans, en plus de faire reculer l’horloge de plusieurs milliers d’années, a renforcé l’idée de liens intimes entre nos ancêtres et les Néandertaliens, dans un passé pas si lointain.



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More holistic approach needed when studying diets of our ancestors

More holistic approach needed when studying diets of our ancestors | Aux origines | Scoop.it
Researchers have long debated how and what our ancestors ate. Charles Darwin hypothesized that the hunting of game animals was a defining feature of early hominids, one that was linked with both upright walking and advanced tool use and that isolated these species from their closest relatives. Other scholars insist that while our ancestors' diets did include meat, it was predominantly scavenged and not hunted. Still others argue that particular plant foods such as roots and tubers were of greate
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What These Archaeologists Found Under The Ground In Turkey Is Absolutely Breathtaking

What These Archaeologists Found Under The Ground In Turkey Is Absolutely Breathtaking | Aux origines | Scoop.it

Beneath the Turkish city of Zeugma lies something you probably won't find by taking a shovel to the patches of dirt in your backyard. Unless, of course, your house is where the Ancient Greeks used to roam. An excavation in Turkey, led by Oxford Archaeology, unearthed three mosaics that are as beautiful as they are old. The mosaics feature some important figures of Ancient Greek mythology, but you don't have to be well-versed on that to enjoy the incredible quality of the pieces. 



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Human DNA shows traces of 40-million-year battle for survival between primate and pathogen

Human DNA shows traces of 40-million-year battle for survival between primate and pathogen | Aux origines | Scoop.it
Examination of DNA from 21 primate species – from squirrel monkeys to humans – exposes an evolutionary war against infectious bacteria over iron that circulates in the host’s bloodstream. Supported by experimental evidence, these findings demonstrate the vital importance of an increasingly appreciated defensive strategy called nutritional immunity.
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The history of King David

The history of King David | Aux origines | Scoop.it
Important information about the period of David’s reign, based on new archaeological and epigraphic data unearthed in northwestern Syria and southern Turkey, has been uncovered by scientists.
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Big-data analysis reveals gene sharing in mice

Big-data analysis reveals gene sharing in mice | Aux origines | Scoop.it
Scientists have detected at least three potential hybridization events that likely shaped the evolutionary paths of 'old world' mice, two in recent times and one in the ancient past. The researchers think these instances of introgressive hybridization -- a way for genetic material and, potentially, traits to be passed from one species to another through interspecific mating -- are only the first of many needles waiting to be found in a very large genetic haystack. While introgressive hybridizati
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Sites de passage (2). Le modèle carnacois des pierres dressées à l’épreuve des steppes et des légendes

Sites de passage (2). Le modèle carnacois des pierres dressées à l’épreuve des steppes et des légendes | Aux origines | Scoop.it
Carnac, dans l’ouest de la France, est un site archéologique extraordinaire – plusieurs milliers de pierres dressées en files juxtaposées, sur des kilomètres de développement - dont la nature et la destination posent problème. Un cadre théorique a été proposé en 2009 qui joue sur plusieurs concepts (la verticalité, la limite, le seuil, la répétition) et plusieurs affects actifs ou sensibles (la pesanteur, la pierre dure, la peur). Le modèle conjoint ces ensembles descriptifs et analytiques où la stèle devient l’élément radical. Notre essai aimerait tester sa valeur prédictive au contact de sites archéologiques eurasiatiques (Arménie, Altaï), dans des environnements montagneux à l’opposé de la situation carnacoise, et à propos de sociétés à la fois plus récentes et principalement tournées vers une activité pastorale nomade. Un pont sera établi avec des récits et des analyses ethnographiques qui permettent d’envisager plusieurs analogies jouant sur certaines données relatives à l’organisation spatiale des structures domestiques et funéraires des sociétés actuelles ou sub-actuelles, de la Sibérie et de la Mongolie. Pour ces régions, une hypothèse générale est avancée par laquelle les monolithes rangés et associés aux tumulus funéraires pourraient jouer un rôle semblable à celui du sêrgê, le piquet d’attache en bois pour les chevaux réels ou célestes. On tentera d’évaluer en retour la pertinence du modèle carnacois à la lumière de ces acquis, notamment en revenant sur la question des orientations.
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Modern genetics confirm ancient relationship between fins and hands

Modern genetics confirm ancient relationship between fins and hands | Aux origines | Scoop.it
Efforts to connect the evolutionary transition from fish fins to wrist and fingers with the genetic machinery for this adaptation have fallen short because they focused on the wrong fish. Now, researchers describe the genetic machinery for autopod assembly in a non-model fish, the spotted gar.
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Descubren cerca de Stonehenge un campamento de 6.000 años

Descubren cerca de Stonehenge un campamento de 6.000 años | Aux origines | Scoop.it
Fuente: RT | 20 de diciembre de 2014

Un grupo de arqueólogos que trabaja cerca del famoso conjunto monumental de Stonehenge, en el Reino Unido, asegura habe…
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Lightweight skeletons of modern humans have recent origin

Lightweight skeletons of modern humans have recent origin | Aux origines | Scoop.it
New research shows that modern human skeletons evolved into their lightly built form only relatively recently—after the start of the Holocene about 12,000 years ago and even more recently in some human populations. The work, based on high-resolution imaging of bone joints from modern humans and chimpanzees ...
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Wild Gorillas Observed Using Tools To Acquire Food For First Time | IFLScience

Wild Gorillas Observed Using Tools To Acquire Food For First Time | IFLScience | Aux origines | Scoop.it
While studying wild gorillas in Rwanda last year, a team of vets observed something very exciting: a young female using a stick to forage for ants.
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L'homme moderne a perdu 20% de densité osseuse par rapport à ces ancêtres

L'homme moderne a perdu 20% de densité osseuse par rapport à ces ancêtres | Aux origines | Scoop.it
Une étude montre que les humains modernes ont perdu 20% de densité osseuse dans leurs membres inférieurs depuis l'avènement de l'agriculture il y a 12.000 ans.
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Descubren “pollos de granja” domesticados hace más de 10.000 mil años

Descubren “pollos de granja” domesticados hace más de 10.000 mil años | Aux origines | Scoop.it
Fuente: La Red 21.com | 30 de noviembre de 2014

Un grupo de investigadores cree haber dado con una granja avícola primitiva, un lugar donde por primera vez…
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'Big Bang' of bird evolution mapped: Genes reveal deep histories of bird origins, feathers, flight and song

'Big Bang' of bird evolution mapped: Genes reveal deep histories of bird origins, feathers, flight and song | Aux origines | Scoop.it
The first findings of the Avian Phylogenomics Consortium are being reported nearly simultaneously in 29 papers -- eight papers in a Dec. 12 special issue of Science and 21 more in Genome Biology, GigaScience and other journals. The analyses suggest some remarkable new ideas about bird evolution, including insights into vocal learning and the brain, colored plumage, sex chromosomes and the birds' relationship to dinosaurs and crocodiles.
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New insights into the origins of agriculture in the Fertile Crescent

New insights into the origins of agriculture in the Fertile Crescent | Aux origines | Scoop.it
The cereal crops that humans rely on today as staple foods result from plant breeding decisions our ancestors made more than 10,000 years ago. Now, a series of intriguing experiments has revealed why those first arable farmers chose to domesticate some cereals and not others. The results could help today's plant breeders improve tomorrow's crops.
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The Archaeology News Network: Linguistic methods uncover sophisticated meanings, monkey dialects

The Archaeology News Network: Linguistic methods uncover sophisticated meanings, monkey dialects | Aux origines | Scoop.it
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Des archéologues trouvent un temple utilisé par d'anciens chasseurs de requin au Pérou | Les découvertes archéologiques

Des archéologues trouvent un temple utilisé par d'anciens chasseurs de requin au Pérou | Les découvertes archéologiques | Aux origines | Scoop.it
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A l’origine de l'Homme sur les différents continents- Hominidés

A l’origine de l'Homme sur les différents continents- Hominidés | Aux origines | Scoop.it

Afin de mieux connaitre l'origine de l'Homme et la date de son arrivée sur les différents continents, de suivre son évolution morphologique et culturelle, l'histoire de ses comportements de subsistance et de son mode de vie tout au long des temps quaternaires, au sein de ses paléoenvironnements, des paléoclimats et de la paléobiodiversité en perpétuelle transformation, les chercheurs du Laboratoire de Préhistoire du Lazaret, avec le concours de l'Institut de Paléontologie Humaine, Fondation Albert 1er Prince de Monaco, et le soutien du Ministère des Affaires étrangères et des Ambassades de France, poursuivent, à l'invitation de divers pays, des recherches multidisciplinaires sur des sites préhistoriques majeurs à travers le monde en utilisant les méthodologies qu'ils ont mises au point.

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Modern humans have become WEAKLINGS compared with ancient ancestors

Modern humans have become WEAKLINGS compared with ancient ancestors | Aux origines | Scoop.it
Research from the University of Cambridge, covering 7,000 years of human evolution, has revealed modern skeletons are more fragile than those belonging to our ancestors (shown).
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Stonehenge discovery could rewrite British pre-history

Stonehenge discovery could rewrite British pre-history | Aux origines | Scoop.it
The most important discovery at Stonehenge for a generation could be destroyed by David Cameron's plan to build a tunnel at the World Heritage Site
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