Jack Horner, sta lavorando per ottenere in laboratorio un pollosauro, un dinosauro vivente In sintesi 1. Gli uccelli discendono dai dinosauri. 2. 3. «Immagino una conferenza affollata. Uovo di Colombo Chi sta sognando a occhi aperti è Jack Horner, uno che di dinosauri se ne intende: direttore del Museum of the Rockies nel Montana, ha rivoluzionato le nostre conoscenze sui dinosauri, dimostrando che quelli dal becco d’anatra avevano una vita sociale e si prendevano cura dei loro piccoli. A Milano, ma senza pollosauro Horner sarà a Milano nella serata di martedì 29 maggio al Museo di Storia Naturale di Milano. Biologists' discovery may force revision of biology textbooks: Novel chromatin particle halfway between DNA and a nucleosome Basic biology textbooks may need a bit of revising now that biologists at UC San Diego have discovered a never-before-noticed component of our basic genetic material. According to the textbooks, chromatin, the natural state of DNA in the cell, is made up of nucleosomes. And nucleosomes are the basic repeating unit of chromatin. When viewed by a high powered microscope, nucleosomes look like beads on a string. But in the Aug. 19 issue of the journal Molecular Cell, UC San Diego biologists report their discovery of a novel chromatin particle halfway between DNA and a nucleosome. "This novel particle was found as a precursor to a nucleosome," said James Kadonaga, a professor of biology at UC San Diego who headed the research team and calls the particle a "pre-nucleosome." The biologists say that while the pre-nucleosome may look something like a nucleosome under the microscope, biochemical tests have shown that it is in reality halfway between DNA and a nucleosome.
The 6 Weirdest Ways Wild Animals Are Having to Adapt to Us Humanity's track record with animals has never been stellar. After centuries of ocean dumping, worldwide deforestation, domestication and overhunting, it's safe to say we've got a greasy, opposable thumb in every one of Mother Nature's pies. That's not to say that humanity's only effect on the animal kingdom is pure destruction; in fact, sometimes our ecological footprint looks more like a clown shoe. #6. Talking Birds Are Teaching Each Other to Swear Probably the only thing you know about parrots and cockatoos is that they can talk. After all, the pets that are raised among humans and learn (or learn to imitate) dozens of words sometimes either escape or are released into the wild. That's why people around Sydney, Melbourne and other big cities in Australia have found wild cockatoos using English phrases. Now imagine how crazy you'd think you were going if one day you were walking through the woods and you suddenly heard a disembodied bird voice tell you to eat a dick. #5. #4. Photos.com
When Video Games Get Stuck In Your Head "Hey, Portal 2 came today! I'll just pop it in real quick. You know, check it out while the wife is getting ready for bed. Just to see if it's worth keeping." 4 a.m. I stumble upstairs and into bed, realizing I've forgotten to brush my teeth only after I've already gotten comfortable. No, it's totally normal that I just laid down and now I'm faced with an intricate logic puzzle revolving around urine and OH GOD I'M PEEING Some small, timid, rational part of my brain pokes at the wall of nonlogic: You've gotten your realities backwards. I shake my head, trying to clear out the incessant portaling keeping me awake. Or you could just portal all the bills to the garbage can, and BAM! Jesus, why does it always hurt to wake up? All right. Just suck it up. That leg is not moving. We have to figure a way out of these oppressive blankets. "Can I start getting ready too?" On the plus side, it's the only time you'll get an actual, in-person view of your own ass. Wait, portals are a real thing, right?
playing guitar Patterns of Gene Flow Define Species of Thermophilic Archaea Abstract Despite a growing appreciation of their vast diversity in nature, mechanisms of speciation are poorly understood in Bacteria and Archaea. Here we use high-throughput genome sequencing to identify ongoing speciation in the thermoacidophilic Archaeon Sulfolobus islandicus. Author Summary Microorganisms from the bacterial and archaeal domains of the tree of life comprise the greatest breadth of biodiversity on earth. Figures Citation: Cadillo-Quiroz H, Didelot X, Held NL, Herrera A, Darling A, et al. (2012) Patterns of Gene Flow Define Species of Thermophilic Archaea. Academic Editor: Nick H. Received: September 11, 2011; Accepted: January 6, 2012; Published: February 21, 2012 Copyright: © 2012 Cadillo-Quiroz et al. Funding: Funding support to R.J.W. was provided by NSF DEB-0816885 and NASA NNX09AM92G. Competing interests: The authors have declared that no competing interests exist. Introduction Results and Discussion Figure 1. doi:10.1371/journal.pbio.1001265.g001 Table 1. Figure 2.
Grasshoppers frightened by spiders affect whole ecosystem Hebrew University, Yale researchers show how grasshoppers 'stressed' by spiders affect the productivity of our soil. How do grasshoppers who are being frightened by spiders affect our ecosystem? In no small measure, say researchers at the Hebrew University of Jerusalem and at Yale University in the US. A grasshopper who is in fear of an attacker, such as a spider, will enter a situation of stress and will consume a greater quantity of carbohydrate-rich plants -- similar to humans under stress who might eat more sweets. This type of reaction will, in turn, cause chemical changes in the grasshopper and in its excretions, affecting the ecosystem it inhabits. When the scared grasshopper dies, its carcass, now containing less nitrogen as a result of its diet change, will have an effect on the microbes in the ground, which are responsible for breaking down animals and plants. Research on this biological-ecological phenomenon was carried out by Dr.
Cetacean Palaeobiology The archaeocetes are a paraphyletic group of primitive cetaceans that include the earliest, terrestrial 'whales'. The group consists of six families: Pakicetidae, Ambulocetidae, Remingtonocetidae, Protocetidae, Basilosauridae and Dorudontidae, although some scientists include the latter two in one single family Basilosauridae. The graph below shows, how these families are related to each other. Cetacean Evolution In order to understand the biology of the archaeocetes, it is important to first consider what sort of terrestrial animals cetaceans originally evolved from. For a long time, palaeontologists speculated that whales were in fact close relatives of mesonychians, an extinct group of hoofed carnivores that indeed included the largest terrestrial carnivore (Andrewsarchus) ever. The relations of early whales (archaeocetes) to artiodactyls and the two extant groups, odontoceti and mysticeti. Pakicetidae (Gingerich and Russell 1990) Pakicetus (a) and Ichthyolestes (b).
7 Awesome Images That Will Make You Mourn The Space Shuttle Last week marked the final official mission of the Space Shuttle. It's over: No more manned space missions on the agenda. As of now, America is pursuing a "flexible path" space-flight program, which essentially means we have nothing. They'll say the program died because of funding cuts and age, but that's not the whole story. Astronauts and the Space Shuttle used to reign as the unquestionable rulers of badass, but then somewhere along the line, cultural opinion shifted, and somehow wrapping a man in a giant metal bullet and firing him into the face of the void became thought of as stuffy and boring. #7. This is the Saturn V rocket, carrying the Apollo 11 moon mission: This is the Discovery launch: This is the Athena II: These images bring up an important question: At what point did we forget that the Space Shuttle was, essentially, a program that strapped human beings to an explosion and tried to stab through the sky with fire and math? #6. #5. #4. How'd that picture turn out? No?
Steampunk and The New Victorians Steampunk aka The New Victorians is a wonderful new trend. Some say this vintage industrial steam era inspired interior and fashion trend was solidified with the amazing interiors of Robin Standefer and Stephen Alesch of Roman and Williams hit the scene. Their design of hospitality spaces across the board is amazing! Have you see the trend popping up? images via roman and williams, cote maison, mikkel vang, house beautiful, my sparrow and glamour Orangutan from Borneo photographed using a spear tool to fish | Primatology.net Tool use among orangutans was first documented by Carel van Schaik. In 1994, Carel observed orangutans developing tools to help themselves eat, while conducting field work in Gunung Leuser National Park, in the northwest Sumatra. Specifically the orangutans were using sticks to pry open pulpy fruits that have “Plexiglas needles” capable of delivering a painful jab covering them. Using the tools, the orangutans were getting past handling the prickly husk and into the nutritious fruit. Recently, Gerd Schuster co-author of Thinkers of the Jungle: The Orangutan Report, took this photograph of, Pretty awesome image, no? Schaik, C.P., Fox, E.A., Sitompul, A.F. (1996). Like this: Like Loading...