Group items tagged Event - Science with Spence

shared by anonymous on 10 Jan 13 - No Cached

shared by Martin M on 08 Jan 13 - No Cached

shared by Dinah M. on 07 Jan 13 - No Cached

How Fish Evolved to Climb Waterfalls With Their Mouths
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uses suckers in its mouth and belly to move up steep cliffs in its rugged Hawaiian habitat.
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Because its freshwater habitat is easily disturbed—by a big storm, for instance—the fish often crawl up waterfalls to return upstream.
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fish uses the same movements to climb as it does to eat algae.
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The Nopili rock-climbing goby has two suckers for climbing.
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This suggests that, at some point in its evolution, the Nopili rock-climbing goby repurposed one behavior for another
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There the scientists filmed them feeding on algae-covered glass and—stimulated by falling water—climbing.
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the team concluded that the fish uses the same overall movements
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Though it's still unknown which behavior came first, the end result is a perfectly adapted fish
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shared by Jinle Z on 08 Jan 13 - No Cached

The Milky Way
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(Jan. 7
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17 percent of stars have a planet 0.8 to 1.25 times the size of Earth in tight orbits
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25 percent of stars have a so-called "super-Earth" (worlds 1.25 to 2 times as big as our own)
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Only 5 percent of stars harbor a gas giant with an orbital period of 400 days or less, researchers said.
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Kepler detects alien worlds by noting the telltale dips in brightness caused when planets cross the face of — or transit — their parent stars from the instrument's perspective.
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minimum of 17 billion small, rocky alien worlds, or an Earth-size planet around one of every six stars.
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Kepler
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Planets
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Harvard-Smithsonian Center for Astrophysics (CfA
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The Astrophysical Journal.
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shared by Abbey B on 08 Jan 13 - No Cached

retinitis pigmentosa, a condition in which the light-sensing cells in the retina gradually die leading to progressive blindness.
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The study was led by Professor Robert MacLaren
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The researchers say the approach has relevance for treating patients with
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in the Nuffield Department of Clinical Neurosciences at the University of Oxford
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Jan. 7, 2013
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'The ability to reconstruct the entire light sensitive layer of the retina using cell transplantation is the ultimate goal of the stem cell treatments for blindness we are all working towards
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cells transplanted into the eye had re-formed a full light-detecting layer on the retina and the mice could see.
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shared by Erica G on 09 Jan 13 - No Cached

Electronic skin
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John Rogers
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Rogers and his collaborators have built an electronic device that’s smaller than a postage stamp and sticks to the skin like a temporary tattoo. The device’s possible users — patients, athletes, doctors, secret agents, you — are limited only by their imaginations.
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Placed on a forehead, the device can record brainwaves; on the wrist, blood flow and muscle movement. On the skin of sick patients, it can track vital signs and watch for problems, replacing the bulky equipment usually found in hospitals. And stuck to the throat, it can function as a secret cell phone, activated by the movements of a person’s voice box.
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Temporary tattoos use a simple and inexpensive way to adhere, or stick, to skin: a good sticky backing that stretches and flexes with skin’s natural motion
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Todd Coleman
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shared by Sari H on 08 Jan 13 - No Cached

what makes the teenager’s brain so complex?
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By peering into the brains of teenagers, scientists who study brain development have  begun finding answers.
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October 17, 2012
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Eveline Crone
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Netherlands
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Teenagers must act on an endless parade of choices.
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