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In Images: A 'Google Maps' for the Mouse Brain. Tiny slices Credit: Allen Institute for Brain Science Researchers recently created a type of Google Maps for the mouse brain.

In Images: A 'Google Maps' for the Mouse Brain

The project, called the Allen Mouse Common Coordinate Framework, began with 234,500 individual sections from 1,675 whole mouse brains. These were collected as part of the Allen Mouse Brain Connectivity Atlas. An average brain A computer program then averaged all 1,675 specimens into a single 3D image, which then became the archetypal average mouse brain for the project. Not your average mouse Here, one view of this average mouse brain. Glowing brain cells Next, anatomists painstakingly tracked fluorescently labeled neurons to identify boundaries between brain regions. The team then created an antomical model that revealed the boundary regions in the mouse brain, shown here in different colors. Detailed brain regions Another view of the boundaries between brain regions in a mouse, as defined by data from the Allen Brain Atlas Mouse Connectivity project. Anatomical structure. Foraging. Plant Identification. La struttura del DNA - Lezione animata. Tree of Life Web Project.

The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world.

Tree of Life Web Project

On more than 10,000 World Wide Web pages, the project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history (phylogeny). Each page contains information about a particular group, e.g., salamanders, segmented worms, phlox flowers, tyrannosaurs, euglenids, Heliconius butterflies, club fungi, or the vampire squid. ToL pages are linked one to another hierarchically, in the form of the evolutionary tree of life. Starting with the root of all Life on Earth and moving out along diverging branches to individual species, the structure of the ToL project thus illustrates the genetic connections between all living things. Opinion: Why Finding Water on Mars Matters. Today's NASA announcement challenges our other assumptions about the universe.

Opinion: Why Finding Water on Mars Matters

By Jared Petty Most of my life I’ve taken the hostility of outer space for granted. Textbooks and teachers taught me about an acidic atmosphere on Venus, bone-crushing gravity on Jupiter, frigid darkness on Pluto, and the arid, dead stone of the Martian wastes. I remember standing in the Smithsonian as a child staring at the lifeless landscapes photographed by the Viking missions, red rocky deserts stretching on to the edge of forever. That image cemented an idea which I accepted for a long time to be a matter of fact, that Mars was an inhospitable, empty rock spinning through space.

NASA Discovers Evidence for Liquid Water on Mars. For years, scientists have known that Mars has ice locked away within its rusty exterior.

NASA Discovers Evidence for Liquid Water on Mars

More elusive, though, is figuring out how much of that water is actually sloshing around in liquid form. Now, NASA scientists have found compelling evidence that liquid water—life-giving, gloriously wet H 20—exists on Mars. We’re not talking gushing rivers or oceans here. These scientists have been investigating “recurring slope lineae,” patches of precipitated salt that appear to dribble down Mars’ steep slopes like tears rolling gently down a cheek.

Planetary scientists hypothesized that the streaky formations were products of the flow of water, but they didn’t have concrete, mineralogical evidence for that idea until now, says Lujendra Ojha, a scientist at Georgia Tech who first spotted the lineae back in 2010. Ojha notes that they haven’t actually observed water flowing on Mars. Quetzalcoatlus. Quetzalcoatlus /kɛtsəlkoʊˈætləs/ was a pterosaur known from the Late Cretaceous of North America (Maastrichtian stage) and the largest known flying animal of all time.


It was a member of the Azhdarchidae, a family of advanced toothless pterosaurs with unusually long, stiffened necks. Its name comes from the Mesoamerican feathered serpent god Quetzalcoatl. Description[edit] Size[edit] Size comparison of Q. northropi (green), Q. sp (blue), and a human When it was first discovered, scientists estimated that the largest Quetzalcoatlus fossils came from an individual with a wingspan as large as 15.9 meters (52 feet), choosing the middle of three extrapolations from the proportions of other pterosaurs that gave an estimate of 11, 15.5 and 21 meters respectively (36 feet, 50.85 feet, 68.9 feet).

Skull[edit] Skull material (from smaller specimens, possibly a related species) shows that Quetzalcoatlus had a very sharp and pointed beak. Discovery and species[edit] Skull reconstruction of Q. sp. Richard Dawkins El Gen Egoista. Confirmed by science: You really can change your DNA - and here's how. Geologic & Evolutionary History of Earth. Natural science. Domains, Species Kingdoms etc.