10.30.2009 - New analyses of dinosaur growth may wipe out one-third of species By Robert Sanders, Media Relations | 30 October 2009 BERKELEY — Paleontologists from the University of California, Berkeley, and the Museum of the Rockies have wiped out two species of dome-headed dinosaur, one of them named three years ago – with great fanfare – after Hogwarts, the school attended by Harry Potter. Dracorex (upper left) and Stygimoloch (upper right) are not distinct dome-headed dinosaurs, but young and nearly sexually mature, respectively, members of the species Pachycephalosaurus wyomingensis, according to a new study by paleontologists from UC Berkeley and the Museum of the Rockies. (Holly Woodward/Montana State University) Their demise comes after a three-horned dinosaur, Torosaurus, was assigned to the dustbin of history last month at the Society of Vertebrate Paleontology meeting in the United Kingdom, the loss in recent years of quite a few duck-billed hadrosaurs and the probable disappearance of Nanotyrannus, a supposedly miniature Tyrannosaurus rex.
Cell Cycle & Cytokinesis - BioChemWeb.org Cell Cycle Regulation and the Control of Cell Proliferation (Cell Growth + Cell Division) Cell Cycle Research - General resource with links to relevant recent literature, news and job listings. (Ion Channel Media Group) Cell Division - Undergraduate-level lectures on cell division. See also the Apoptosis, Cell Senescence and Signal Transduction pages. Mitosis, Meiosis and the Mechanics of Cell Division See also the Cytoskeleton, Cell Motility and Motors page. Cancer Resources A major component of cancer progression is the loss of normal controls on cell proliferation (disruption of normal cell cycle regulation and cell signaling), in addition to other changes involving angiogenesis, cell adhesion, invasion and metastasis. See also the Tumor Cell Invasion and Metastasis section of the Cytoskeleton, Cell Motility and Motors page and the Angiogenesis, Cell Adhesion and Extracellular Matrix and Signal Transduction pages. Labs Studying Visits:
Mistaken Identity In 1903, a prisoner named Will West arrived at Leavenworth. The record clerk took the photographs above and, thinking he remembered West, asked whether he had been there before. West said no. The clerk took some measurements, went to the file, and produced this record, bearing the name William West: Amazed, the prisoner said, “That’s my picture, but I don’t know where you got it, for I know I have never been here before.” Incredibly, this was true. The case became a strong argument in favor of the new science of fingerprinting.
Archaeologists explore Iraqi marshes for origins of urbanization The first non-Iraqi archaeological investigation of the Tigris-Euphrates delta in 20 years was a preliminary foray by three women who began to explore the links between wetland resources and the emergence and growth of cities last year. "Foreign investigations in Iraq stopped in the 1990s," said Carrie Hritz, assistant professor of anthropology, Penn State. "Iraqis continued research, but because their work is unpublished, we are unsure of where they surveyed." The marshlands in Iraq and Iran were drained between 1950 and the 1990s. Restoration of the Hammar marshes is now a high national priority. The project aims to investigate the contributions of the early-mid Holocene shoreline of the gulf and marshes to the economic foundations of Mesopotamian cities. Hritz notes, however, that marshes have all the resources necessary for settlement -- fish, game and plants. Carrying out any type of survey in a country at war is difficult and making arrangements becomes a daunting task.
Brain Atlas - Introduction The central nervous system (CNS) consists of the brain and the spinal cord, immersed in the cerebrospinal fluid (CSF). Weighing about 3 pounds (1.4 kilograms), the brain consists of three main structures: the cerebrum, the cerebellum and the brainstem. Cerebrum - divided into two hemispheres (left and right), each consists of four lobes (frontal, parietal, occipital and temporal). The outer layer of the brain is known as the cerebral cortex or the ‘grey matter’. It covers the nuclei deep within the cerebral hemisphere e.g. the basal ganglia; the structure called the thalamus, and the ‘white matter’, which consists mostly of myelinated axons. – closely packed neuron cell bodies form the grey matter of the brain. Cerebellum – responsible for psychomotor function, the cerebellum co-ordinates sensory input from the inner ear and the muscles to provide accurate control of position and movement. Basal Ganglia Thalamus and Hypothalamus Ventricles Limbic System Reticular Activating System Neurons Glia
Your Age on Other Worlds Want to melt those years away? Travel to an outer planet! <div class="js-required"><hr> This Page requires a Javascript capable browser <hr></div> Fill in your birthdate below in the space indicated. The Days (And Years) Of Our Lives Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. The earth is in motion. The top-like rotation of the earth on its axis is how we define the day. The revolution of the earth around the sun is how we define the year. We all learn in grade school that the planets move at differing rates around the sun. Why the huge differences in periods? Johannes Kepler Tycho Brahe Kepler briefly worked with the great Danish observational astronomer, Tycho Brahe. Here you see a planet in a very elliptical orbit. Kepler's third law is the one that interests us the most. Let's just solve for the period by taking the square root of both sides: The Gravity Of The Situation Isaac Newton ©2000 Ron Hipschman
Dinosaur Death Trap: Gobi Desert Fossils Reveal How Dinosaurs Lived "Another skeleton with a perfect skull!” I shouted to the team, all of whom were face down on the quarry floor exposing other skeletons. In the years I had spent as a paleontologist, never had I seen anything like this. Over the next few weeks we would apply chisel, pickax and bulldozer to the site, digging up more than a dozen examples of an ostrichlike dinosaur that was to become one of the most well known in the dinosaur world. Select an option below: Customer Sign In *You must have purchased this issue or have a qualifying subscription to access this content BRAINMETA.COM - NEUROSCIENCE, CONSCIOUSNESS, BRAIN, MIND, MIND-BRAIN, NEUROINFORMATICS, BRAIN MAPS, BRAIN ATLASES Prehistoric Human Brain Found Pickled in Bog - One of the world's best preserved prehistoric human brains was recently found in a waterlogged U.K. pit. - The brain belonged to an Iron Age man who was hanged and then decapitated, with his head falling in the pit shortly thereafter. - Scientists believe that submersion in liquid, anoxic environments helps to preserve human brain tissue. A human skull dated to about 2,684 years ago with an "exceptionally preserved" human brain still inside of it was recently discovered in a waterlogged U.K. pit, according to a new Journal of Archaeological Science study. The brain is the oldest known intact human brain from Europe and Asia, according to the authors, who also believe it's one of the best-preserved ancient brains in the world. "The early Iron Age skull belonged to a man, probably in his thirties," lead author Sonia O'Connor told Discovery News. SLIDE SHOW: Faces of Our Ancestors The brain-containing skull was found at Heslington, Yorkshire, in the United Kingdom.