nova science now
Clément Gilbert est chercheur au laboratoire Ecologie et Biologie des interactions (CNRS / université de Poitiers). Avec Cédric Feschotte, professeur à l’université du Texas à Arlington, il a récemment publié un article dans Nature Reviews Genetics consacré aux virus endogènes, ces virus dont le génome est intégré pour tout ou partie dans le génome des espèces-hôtes (dont l'espèce humaine) et qui ouvrent une fascinante fenêtre sur l'évolution du monde viral. Des films comme Contagion ou des alertes médiatiques comme celle entourant la grippe aviaire ou la grippe A (H1N1) donnent au public la même image du virus pathogène et dangereux. « Les humains sont apparentés aux virus »
Prehistoric Archaeology & Human Evolution
Courtesy of Steven Churchill, Duke University. Pieces of the Human Evolutionary Puzzle: Who Was Australopithecus sediba? | Anthropology in Practice
How Humans Became Social Look around and it's impossible to miss the importance of social interactions to human society. They form the basis of our families, our governments, and even our global economy. But how did we become social in the first place? Researchers have long believed that it was a gradual process, evolving from couples to clans to larger communities.
Extinct Genome From Fossil Finger Posted Online Researchers in Germany today posted the first high-resolution version of an extinct human's genome on the Web site for the Max Planck Institute for Evolutionary Anthropology. The goal: to allow colleagues to download the most complete sequence data available for free. A year ago, researchers published the first rough draft of the genome of an archaic girl who lived in Denisova Cave, Siberia, at least 30,000 years ago. In January, Max Planck paleogeneticist Svante Pääbo was at a meeting in Sweden when he realized that researchers in other labs were poring over year-old sequence data that was far less complete than what his colleagues had obtained in the lab in the past year using sensitive, new methods to sequence ancient DNA. "I felt bad knowing that we had this very much better version of the same genome and that it would be a few months before it became available," says Pääbo.
Evolution::News::January 25, 2012:: ::Email::Print A new hypothesis holds that the natural selection produced the chimpanzee's nicer cousin in much the same way that humans bred dogs from wolves Tame Theory: Did Bonobos Domesticate Themselves?
Human Ancestors Were Nearly All Vegetarians | Guest Blog Paleolithic diets have become all the rage, but are they getting our ancestral diet all wrong? Right now, one half of all Americans are on a diet. The other half just gave up on their diets and are on a binge. Collectively, we are overweight, sick and struggling.
Alexander Joe/Agence France-Presse — Getty Images Lee Berger with his son, Matthew, and fossils of Australopithecus sediba. New Fossils May Redraw Human Ancestry - NYTimes.com
Gains in DNA Are Speeding Research Into Human Origins Another paper, by Mathias Currat and Laurent Excoffier, two Swiss geneticists, suggests that breeding between Neanderthals and modern humans was rare.
Earliest Homo Erectus Tools Found in Kenya A new geological study, being reported Thursday in the journal Nature, showed that tools from a site near Lake Turkana in Kenya were made about 1.76 million years ago, the earliest of their ilk found so far.
Humans and Neanderthals had sex, but not very often | Not Exactly Rocket Science Tens of thousands of years ago, our ancestors spread across the world, having sex with Neanderthals, Denisovans and other groups of ancient humans as they went. Today, our genes testify to these prehistoric liaisons. Last year, when the Neanderthal genome was finally sequenced, it emerged that everyone outside of African can trace 1 and 4 percent of their DNA from Neanderthals. The discovery was a vindication for some and a surprise to others. For decades, palaeontologists had fought over different visions of the rise of early humans. Some championed the “Out of Africa” model, which says that all of us descend from a small group of ancestors who came out of Africa, swept the world, and replaced every other group of early humans.
Homo sapiens - Who are we ?