links (2/226) Flux

Génétique ibérique

Un estudio internacional coliderado por el Consejo Superior de Investigaciones Científicas (CSIC) y la Universidad de Harvard (Estados Unidos) ha elaborado un mapa genético de la península Ibérica que abarca los últimos 8.000 años. El estudio, publicado en la revista Science, ha analizado los genomas de 271 habitantes de la Península de diferentes épocas históricas y los ha contrastado con los datos recogidos en estudios previos de otros 1.107 individuos antiguos y de 2.862 modernos. Los resultados muestran una imagen inédita hasta el momento de la transformación de la población ibérica a lo largo de las diferentes etapas históricas y prehistóricas.

Titre
Científicos del CSIC reconstruyen la historia genómica de la península Ibérica - csic-es
Éditeur
www.csic.es
Date
Titre
The genomic history of the Iberian Peninsula reconstructed
Auteurs
  • CSIC
Éditeur
EurekAlert!
Date

Domestication du renard

Findings of canid remains in graves at different sites in the northeast of the Iberian Peninsula are evidence of a widespread funerary practice that proliferated between the end of the 3rd and the 2nd millennium BC, in particular, in the Early-Middle Bronze Age contexts. The discovery of four foxes and a large number of dogs at the sites of Can Roqueta (Barcelona) and Minferri (Lleida) respectively, stand out among the many examples of these types of grave goods. In this work, we have made an approximation of the relationship between humans and canids through the study of their diet by analysis of stable isotopes of carbon and nitrogen in bone collagen. These analyses were complemented by archaeozoological, anthropological and archaeobotanical studies. The comparison of human and animal diets comprised a total of 37 canids, 19 domestic ungulates and 64 humans. The results indicate that the diet of the dogs was similar to that of humans, although δ15N values of dogs in Can Roqueta and Minferri are, on the average, 1.4‰ and 1.1‰, respectively, lower than those of humans. The offset between canids and the herbivorous ungulates of each site is not up to the established minimum for a trophic level, which implies an input of C3 plants and human intervention in the feeding of dogs and some of the foxes. Some particular cases in Can Roqueta suggest a specific food preparation, richer in cereals, for larger dogs (probably devoted to carrying loads), and possibly for at least one of the foxes.

Titre
Dogs and foxes in Early-Middle Bronze Age funerary structures in the northeast of the Iberian Peninsula- human control of canid diet at the sites of Can Roqueta (Barcelona) and Minferri (Lleida)
Auteurs
  • Aurora GRANDAL-D’ANGLADE
  • Silvia ALBIZURI
  • Ariadna NIETOTONA
  • MajóBibiana AGUSTÍ
  • Natalia ALONSO
  • Ferran ANTOLÍN
  • Joan LÓPEZ
  • Andreu MOYA
  • Alba RODRÍGUEZ
  • Antoni PALOMO
Éditeur
Archaeological and Anthropological Sciences
Date

Illustration de J. A. Peñas.

Tunnels fossilisés

L’apparition des premiers mouvements chez des êtres multicellulaires sur Terre serait bien plus ancienne que ce que l’on pensait. C’est du moins ce que suggèrent de petits tunnels fossilisés trouvés au Gabon dans des roches vieilles de 2,1 milliards d'années.

Titre
Il y a 2,1 milliards d’années, la vie bougeait déjà
Auteurs
  • Jean-Baptiste VEYRIERAS
Éditeur
Le journal du CNRS
Date

Aaron Swartz : 1986 - 2013

Image

Aaron Swartz, 8 novembre 1986 – 11 janvier 2013. (RSS, Reddit, Creative Commons, Open Library, Markdown, Demand Progress, ...).
Titre
RIP, Aaron Swartz
Auteurs
  • Cory DOCTOROW
Éditeur
BoingBoing
Date
Titre
Prosecutor as bully
Auteurs
  • Lawrence LESSIG
Éditeur
Lessig Blog, v2
Date
Titre
The Truth about Aaron Swartz's “Crime”
Auteurs
  • Alex STAMOS
Éditeur
Unhandled Exception
Date

Ce qu'il reste de nos rêves