Boutique de tee shirts en ligne. Des tee shirts uniques, créés par des illustrateurs de métier. BBC Nature - Giant squid genetics reveal family secrets 20 March 2013Last updated at 07:53 By Ella Davies Reporter, BBC Nature An artist's impression of the shy submariner Giant squid around the world are "basically identical" despite looking very different, say scientists. The super-sized cephalopods live deep in the oceans and are little-known by the scientific community. An international team of researchers investigated rare samples of the elusive animals' DNA to reveal their family secrets. They discovered that there is just a single species of squid with no population structure. The findings are published in the journal Proceedings of the Royal Society B. The giant squid has been a source of fascination both before and beyond its formal description in 1857 by Danish biologist Japetus Steenstrup. Its deep-dwelling lifestyle is largely unknown but specimens have been found globally, with the exception of Arctic and Antarctic waters. "But off [the coast of] Japan for example, they're much shorter and stubbier. 'Very weird'
You Are Here Absolutely Genius Ideas data-original="images/genius/29.jpg" class="lazy image"/> data-original="images/genius/75.jpg" class="lazy image"/> Tee-shirts motif - Collection de Tee Shirts motif Birds Evolve Shorter Wings To Escape Traffic Crush Copyright © 2013 NPR. For personal, noncommercial use only. See Terms of Use. For other uses, prior permission required. This is SCIENCE FRIDAY. My next guest is the lead author of that paper. CHARLES BROWN: Hello, John. DANKOSKY: So tell us about the birds you're studying. BROWN: Well, I've been working on cliff swallows for about 30 years, and my major interest is why these animals are social. And we would frequently find dead birds. DANKOSKY: How many birds did you collect overall? BROWN: Well, overall, we have about 200 - I think about 200 road kills that we were able to save over the years. BROWN: And these, of course, were prepared, and we still have them. DANKOSKY: So tell us what you found. BROWN: Well, the most surprising thing was that the wing length on these road kill birds was longer than on a sample of birds that had died accidentally in mist nets. We also have that the average wing length has gone down over time. BROWN: Well, there are several possibilities. BROWN: No.
Qwertee : Limited Edition Cheap Daily T Shirts | Gone in 24 Hours | T-shirt Only £8/€10/$12 | Cool Graphic Funny Tee Shirts It's Called 'De-Extinction' — It's Like 'Jurassic Park,' Except It's Real : The Picture Show Sorry to disappoint, but science writer Carl Zimmer says we're not going to bring back dinosaurs. But, he says, "science has developed to the point where we can actually talk seriously about possibly bringing back more recently extinct species." It's called "de-extinction" — and it's Zimmer's cover story for National Geographic's April issue. Resurrection Tintypes To capture the mood of this story, National Geographic hired tintype photographer Robb Kendrick. Hide caption The bucardo, or Pyrenean ibex, lived high in the Pyrenees until its extinction in 2000. Hide caption Though it looked like a wolf and was called a Tasmanian tiger, the thylacine was actually a marsupial — a relative of kangaroos and koalas. In 2003, he tells Morning Edition's Steve Inskeep, scientists took some DNA that had been rescued from the very last bucardo, a type of wild goat that had recently gone extinct. How de-extinction works is complicated, and that's what the National Geographic article is for.
Discourse on the Origin and the Foundations of Inequality Among Men / Jean-Jacques Rousseau To the Republic of Geneva Magnificent, most honorable, and sovereign lords Convinced that only the virtuous citizen may justifiably give his native land honours which it can accept, I have been working for thirty years to become worthy of offering you public homage; and since this happy occasion supplements in part what my efforts have not been able to accomplish, I believed that I would be permitted here to follow the zeal which animates me rather than the right which ought to act as my authorization. Having had the good fortune to be born among you, how could I reflect on the equality which nature has set among men and on the inequality which they have instituted, without thinking about the profound wisdom with which both of these, happily combined in this State, work together in a manner most closely approaching natural law and most favourable to society to maintain public order and the happiness of individuals? I am, with the most profound respect,
Leon Kass on Science and Religion Leon Kass has written an article for Commentary (April 2007)on "Science, Religion, and the Human Future."Steven Pinker and others have written responses to the article. Since Kass's article is a good summary of his ideas about modern science and its limitations, reading the article has stirred me to ponder my points of agreement and disagreement with his thinking. As a young man, I decided that what Leo Strauss called the "fundamental dilemma" of modernity explained the loss of liberal education as a comprehensive study of the whole. We might overcome this dilemma, I thought, if we could see Darwinian biology as a comprehensive science that would unify all the intellectual disciplines by studying human experience as part of the natural whole. Reading Leon Kass's Towards a More Natural Science helped me to see how I might answer these Straussian objections. On the question of teleology, I was impressed by Kass's distinction between "external teleology" and "immanent teleology."
Darwin and philosophy Read So people like Richard Dawkins took it upon themselves to explain altruism and ethics through natural evolutionary processes. And, even though Dawkins himself explicitly says that this doesn’t in any way undermine ethics, word got out. So Dawkins’ idea was that human beings just carry this genetic material around, and the genetic material - and this is a kind of misleading metaphor - wants to preserve itself, and this in some way manifests itself in the way human beings behave to each other. And his claim was that human behaviour, human ethical behaviour, the way we interact with each other, is explained by this natural evolutionary process of genes preserving themselves. That’s just a mistake because there is an evolutionary explanation for everything, but that doesn’t tell us what ethics and morality tells us, which is what we should do. And I think that’s a lesson which you might find pessimistic, or you might find optimistic.