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NASA's Curiosity Rover Drills Sandstone Slab on Mars - Mars Science Laboratory - 0 views

  • The full-depth hole for sample collection is close to a shallower test hole drilled last week in the same rock, which gave researchers a preview of the interior material as tailings around the hole
  • "The drill tailings from this rock are darker-toned and less red than we saw at the two previous drill sites," said Jim Bell
  • , deputy principal investigator for Curiosity's Mast Camera (Mastcam)
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  • "This suggests that the detailed chemical and mineral analysis that will be coming from Curiosity's other instruments could reveal different materials than we've seen before.
  • Sample material from Windjana will be sieved, then delivered in coming days to onboard laboratories for determining the mineral and chemical composition
  • One motive for the team's selection of Windjana for drilling is to analyze the cementing material that holds together sand-size grains in this sandstone.
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May 15 - Today in Science History - Scientists born on May 15th, died, and events - 0 views

  • Kepler's Law
  • In 1618, Johannes Kepler discovered his harmonics law published in his five-volume work Harmonices Mundi (Harmony of the Worlds, 1619). He attempted to explain proportions and geometry in planetary motions by relating them to musical scales and intervals (an extension of what Pythagoras had described as the “harmony of the spheres”.) Kepler said each planet produces musical tones during its revolution about the sun, and the pitch of the tones varies with the angular velocities of those planets as measured from the sun. The Earth sings Mi, Fa, Mi. At very rare intervals all planets would sing in perfect concord. Kepler proposed that this may have happened only once in history, perhaps at the time of creation.«
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May 17 - Today in Science History - Scientists born on May 17th, died, and events - 0 views

  • CERN groundbreaking
  • In 1954, official ground-breaking took place at the Meyrin site of the new CERN Laboratory in Geneva. A recommendation had been adopted 12 Dec 1949 at the European Cultural Conference for a European Institute of Nuclear Physics. By 1952, the third session of its provisional Council decided to locate in Switzerland. In Jun 1953, the host community, the canton of Geneva, gave strong approval in a referendum passing with 16539 votes to 7332. On 29 Sep 1954, twelve founding Member States ratified CERN (Centre Européenne de Recherche Nucléaire): Federal Republic of Germany, Belgium, Denmark, France, Greece, Italy, Norway, Netherlands, United Kingdom, Sweden, Switzerland and Yugoslavia.
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May 18 - Today in Science History - Scientists born on May 18th, died, and events - 0 views

  • Mount St. Helens
  • In 1980, following a weeklong series of earthquakes and smaller explosions of ash and smoke, the long-dormant Mount St. Helens volcano erupted in Washington state, U.S., hurling ash 15,000 feet into the air and setting off mudslides and avalanches. The eruptions caused minimal damage in the sparsely populated area, but about 400 people - mostly loggers and forest rangers - were evacuated. The explosion was characterized as the equivalent of 27,000 atomic bombs. The cloud of ash eventually circled the globe
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May 19 - Today in Science History - Scientists born on May 19th, died, and events - 0 views

  • Halley's Comet
  • In 1910, the Earth passed through the tail of Halley's Comet, the most intimate contact between the Earth and any comet in recorded history. The event was anticipated with dire predictions. Since a few years earlier, astronomers had found the poisonous gas cyanogen in a comet, it was surmised that if Earth passed through the comet's tail everyone would die. Astronomers explained that the gas molecules within the tail were so tenuous that absolutely no ill effects would be noticed. Nevertheless, ignorance bred opportunists selling "comet pills" to the panicked portion of the public to counter the effects of the cyanogen gas. On 20 May, after Earth had passed through the tail, everyone was still alive - with or without taking pills!
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CERN - Wikipedia, the free encyclopedia - 0 views

  • The acronym CERN originally stood in French for Conseil Européen pour la Recherche Nucléaire (European Council for Nuclear Research), which was a provisional council for setting up the laboratory, established by 12 European governments in 1952
  • The acronym was retained for the new laboratory after the provisional council was dissolved, even though the name changed
  • This NeXT Computer used by British scientist Sir Tim Berners-Lee at CERN became the first Web server
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  • This Cisco Systems router at CERN was probably one of the first IP routers deployed in Europe
  • Soon after the laboratory's establishment, its work went beyond the study of the atomic nucleus into higher-energy physics
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First diplodocid sauropod from South America found -- ScienceDaily - 0 views

  • The discovery of a new sauropod dinosaur species, Leinkupal laticauda, found in Argentina may be the first record of a diplodocid from South America and the youngest record of Diplodocidae in the world
  • Diplodocids are part of a group of sauropod dinosaurs known for their large bodies, as well as extremely long necks and tails
  • Scientists have identified a new diplodocid sauropod from the early Cretaceous period in Patagonia, Argentina -- the first diplodocid sauropod discovered in South America
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  • Though the bones are fragmentary, scientists found differences between this species and other diplodocid species from North American and Africa in the vertebrae where the tail connects to the body
  • These differences suggest to the authors that it may warrant a new species name, Leinkupal laticauda
  • apparently lived much later than its North American and African cousins
  • existence suggests that the supposed extinction of the Diplodocidae around the end of the Jurassic or beginning of the Cretaceous period didn't occur globally
  • the clade survived in South America at least during part of the Early Cretaceous.
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Study probes why kids with autism are oversensitive to touch, noise - 0 views

  • Certain areas in the brains of children with autism overreact to sensory stimuli, such as the touch of a scratchy sweater and loud traffic noises
  • a new small study shows
  • The finding helps to explain why autistic kids are five times more likely than other children to be overwhelmed by everyday sensations
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  • It's a condition called sensory over-responsivity, and it was recognized as one of the core features of autism spectrum disorder
  • "I think if anybody ever had a doubt that this was just some sort of odd pickiness or something like that in people with autism, this shows, no, there really is a brain basis for this," said Dr. Paul Wang
  • researchers recruited 32 children and teens. Half the group had been diagnosed with autism. The others were typically developing kids who were matched in age to the autistic kids.
  • scientists had them rest in a fMRI machine, a kind of scanner than can see brain activity in real time
  • they touched the kids with a scratchy wool sweater, played loud traffic noises or did both at the same time. Each condition was repeated four times for 15 seconds
  • The brains of children with autism reacted much more strongly to the sensory stimulation than did the brains of typically developing kids
  • The two areas that seemed to be the most hyperactive were the primary sensory cortex, which is responsible for initially processing sensory information, and the amygdala, which is involved in emotional regulation.
  • They are kind of initially interpreting these stimuli differently and, also, they're not able to regulate their response
  • Shula Green, a Ph.D. candidate
  • typical kids,
  • have an initial response almost immediately, then by the second time around, that response goes way down
  • In kids with autism, that response really stays high throughout the scan. They're not getting used to it
  • the hyperactivity the researchers saw on the brain scans became most intense when kids with autism experienced the two sensations at the same time
  • something is really going on when there's more than one stimulus the brain has to deal with
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Direct Image of an Exoplanet 155 Light Years Away - 0 views

  • This week, an international team of researchers
  • announced the discovery of an exoplanet
  • 155 light years
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  • world is estimated to be 11 times the mass of Jupiter — placing it just under the lower mass limit for brown dwarf status
  • orbits its host star 2,000x farther than the distance from Earth to the Sun once every 80,000 (!) years
  • The primary star, GU Psc A, is an M3 red dwarf weighing in at 35% the mass of our Sun and is just 100 million years old
  • researchers targeted GU Psc after it was determined to be a member of the AB Doradus moving group of relatively young stars, which are prime candidates for exoplanet detection
  • The fact that GU Psc B was captured by direct imaging at 155 light years distant is amazing
  • The team was able to discern this curious planet by utilizing observations from the W.M. Keck observatory, the joint Canada-France-Hawaii Telescope, the Gemini Observatory and the Observatoire Mont-Mégantic in Québec.
  • there are not a lot of exoplanets that were detected ‘directly’ so far
  • The few planets for which we have an actual image are interesting because we can analyze their light directly, and thus learn much more about them
  • researcher Marie-Ève Naud and her co-advisor Étienne Artigau
  • also one of the “coolest” planets that have been directly imaged, showing methane absorption
  • it is certainly the most distant exoplanet to a main-sequence star that has been found so far
  • This distance makes GU Psc b very interesting from a theoretical point of view, because it’s hard to imagine how it could have formed in the protoplanetary disk of its star
  • current working definition of an exoplanet is based solely on mass (<13 Jupiter masses), so GU Psc b probably formed in a way that is more similar to how stars formed
  • how are astronomers certain that PU Psc b is related to its host and not a foreground or background object?
  • As the host star, GU Psc is relatively nearby; it displays a significant apparent proper motion
  • relative to distant background stars and galaxies.
  • On images taken one year apart with WIRCam on the Canada-France-Hawaii Telescope, we observed that the companion displays the same big proper motion, i.e. they move together in the plane of the sky, while the rest of the stars in the field don’t
  • most planet hunting techniques using direct imaging involve state-of-the-art adaptive optics systems, but we used ‘standard’ imaging without any exotic techniques
  • To find this planet, we used very sensitive ‘standard’ imaging,
  • we chose carefully the wavelengths where planets display colors that are unlike most other astrophysical objects such as stars and galaxies
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May 23 - Today in Science History - Scientists born on May 23rd, died, and events - 0 views

  • Bifocal spectacles
  • In 1785, a letter from Benjamin Franklin referred to his bifocal glasses. Writing from France to George Whatley, a friend, Franklin described his “double glasses” solution to needing two pairs of glasses of different focussing power to see objects far or near He wrote, “I had the glasses cut and half of each kind associated in the same circle. ... I have only to move my eyes up and down as I want to see far or near, the proper glasses always being ready.” The wording the letter leaves it uncertain has long before Franklin had referrred to. Some historians have pointed to evidence of others making split-lens spectacles. So, it remains likely, but not definite, that Franklin actually invented the bifocal glasses, and it may have been in the early 1760s. He was certainly well-known for wearing and popularizing them
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May 26 - Today in Science History - Scientists born on May 26th, died, and events - 0 views

  • Leeuwenhoek's animalcules
  • In 1676, Antonie van Leeuwenhoek applied his hobby of making microscopes from his own handmade lenses to observe some water running off a roof during a heavy rainstorm. He finds that it contains, in his words, “very little animalcules.” The life he has found in the runoff water is not present in pure rainwater. This was a fundamental discovery, for it showed that the bacteria and one-celled animals did not fall from the sky. When a ball of molten glass is inflated like a balloon, a small droplet of the hot fluid collects at the very bottom the bubble. Leeuwenhoek used these droplets as microscope lenses to view the animalcules. Despite their crude nature, those early lenses enabled Leeuwenhoek to describe an amazing world of microscopic life
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Hubble Sees Jupiter's Red Spot Shrink to Smallest Size Ever - 0 views

  • “Recent Hubble Space Telescope observations confirm that the spot is now just under  10,250 miles (16,500 km) across, the smallest diameter we’ve ever measured,” said Amy Simon of NASA’s Goddard Space Flight Cente
  • Using historic sketches and photos from the late 1800s, astronomers determined the spot’s diameter then at 25,475 miles (41,000 km) across
  • Amateur observations starting in 2012 revealed a noticeable increase in the spot’s shrinkage rate
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  • The spot’s “waistline” is getting smaller by just under 620 miles (1,000 km) per year while its north-south extent has changed little
  • the spot has
  • become more circular in shape
  • what causing the drastic downsizing, there are no firm answers yet:
  • new observations
  • very small eddies are feeding into the storm
  • may be responsible for the accelerated change by altering the internal dynamics of the Great Red Spot
  • The Great Red Spot has been a trademark of the planet for at least 400 years
  • a giant hurricane-like storm whirling in the planet’s upper cloud tops with a period of 6 days
  • The storm appears to be conserving angular momentum by spinning faster the same way an ice skater spins up when she pulls in her arms
  • Wind speeds are increasing too, making one wonder whether they’ll ultimately shrink the spot further or bring about its rejuvenation.
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ISEE-3 Reboot Project | Astronomy News - 0 views

  • The IEEE-3 spacecraft was launched on 12 August 1978
  • Originally the mission was cooperative effort between NASA and ESRO/ESA to study the interaction between the Earth’s magnetic field and the solar wind.
  • On 10 June 1982 IEEE-3 became the International Cometary Explorer with the primary scientific objective of ICE was to study the interaction between the solar wind and a cometary atmosphere
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  • The mission required the spacecraft to leave the Earth/moon system and orbit around the sun instead
  • After encounters with comet Giacobini-Zinner in 1985 and the famous Halley’s comet in 1986 and the study of CME’s from the sun in 1991, the “plug” was pulled in the spacecraft on 5 May 1997
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