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March 27 - Today in Science History - Scientists born on March 27th, died, and events - 0 views

  • Alaska earthquake
  • In 1965, south central Alaska was rocked by North America's greatest earthquake. (At 8.3-8.5 on the Richter scale, it released over twice the energy of the 1906 San Francisco earthquake.) Its epicenter was near Price William Sound, along a 1,000 km thrust fault where the Pacific plate subducts under the North american plate. The earthquake tilted at least 120,000 sq km. Some landmasses were thrust up locally as high as 25 m; elsewhere land sank as much as 2.5m. The shock was felt over almost 1,300,000 sq km. Extensive coastal damage resulted from submarine landslides and tsunamis which caused 122 of the 131 deaths. Property damage cost was about $311 million. Tsunami damage reached Crescent City, Calif. Tens of thousands of aftershocks indicated that the region of faulting extended about 1,000 km.
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March 28 - Today in Science History - Scientists born on March 28th, died, and events - 0 views

  • Hoyle coined “Big Bang”
  • In 1949, Fred Hoyle unintentionally coined the term “Big Bang” as a household name, in a scripted radio broadcast on the BBC Third Programme. His talk was printed in the The Listener (7 Apr 1949). He compared his own belief in a “steady state” universe, saying, “earlier theories … were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past.” He repeated its use in a 1950 broadcast published in The Listener (9 Mar 1950): “One [idea] was that the Universe started its life a finite time ago in a single huge explosion… This big bang idea seemed to me to be unsatisfactory.” His critics found the “big bang” term pejorative, yet Hoyle has said his intention was to make a vivid description for the radio audience. The term stuck
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March 29 - Today in Science History - Scientists born on March 29th, died, and events - 0 views

  • Coca-Cola
  • In 1886, the first batch of Coca Cola was brewed over a fire in a backyard in Atlanta, Georgia. Dr. John Pemberton had created the concoction as a cure for "hangover," stomach ache and headache. He advertised it as a "brain tonic and intellectual beverage," and first sold it to the public a few weeks later on 8 May. Coke contained cocaine as an ingredient until 1904, when the drug was banned by Congress.
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    Coca-Cola
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Curiosity Pulls into Kimberly and Spies Curvy Terrain For Drilling Action - 0 views

  • NASA’s Curiosity rover has just pulled into
  • terrain chock full of curvy rock outcrops at Kimberly that’s suitable for contact science and drilling action
  • The robot’s arm has been deployed to investigate the most scientifically productive spots
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  • the mast mounted ChemCam laser and high resolution cameras to determine the best spot for drilling and sampling.
  • the art robot is conducting contact science with the cameras and spectrometers on the terminus of the 7 foot long robotic arm
  • The team commanded Curiosity to clean out the arms CHIMRA sample handling mechanism in anticipation of boring into the Martian outcrops and delivering
  • samples of cored Martian rocks to the SAM and CheMin miniaturized chemistry labs
  • Scientists directed Curiosity on a pinpoint drive to Kimberly after their interest was piqued by orbital images taken
  • NASA’s Mars Reconnaissance Orbiter (MRO)
  • see three terrain types exposed and a relatively dust-free surface
  • The missions science focus has shifted to “search for that subset of habitable environments which also preserves organic carbon,”
  • To date Curiosity’s odometer stands at 6.2 kilometers
  • has somewhat over another 4 kilometers to go to reach the base of Mount Sharp
  • may arrive at the lower reaches of Mount Sharp sometime in mid 2014, but must first pass through a potentially treacherous dune field
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New drug raises potential for cancer treatment revolution - 0 views

  • A new study
  • has developed a new drug that can manipulate the body's natural signalling and energy systems, allowing the body to attack and shut down cancerous cells.
  • ZL105,
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  • the drug is a compound based on the precious metal iridium
  • The study has found ZL105 could potentially replace currently used anticancer drugs
  • which become less effective over time, cause a wide-range of side-effects and damage healthy cells as well as cancerous.
  • study co-author
  • said "The energy-producing machinery in cancer cells works to the limit as it attempts to keep up with quick proliferation and invasion
  • This makes cancer cells susceptible to minor changes in the cell 'power-house'.
  • drug pushes cancer cells over the limit causing them to slow and shut down, whilst normal cells can cope with its effects
  • Preliminary data indicate that the novel drug may be ten times more effective in treating ovarian, colon, melanoma, renal, and some breast cancers, according to data obtained by the US National Cancer Institute
  • researchers now aim to expand the study to cancers that are inherently resistant to existing drugs and to those which have developed resistance after a first round of chemotherapy treatments.
  • Existing cancer treatments often become less effective after the first course, as cancer cells learn how they are being attacked
  • The drug we have developed is a catalyst and is active at low doses
  • It can attack cancer cells in multiple ways at the same time, so the cancer is less able to adapt to the treatment
  • means the new drugs could be much more effective than existing treatments
  • Platinum-based drugs are used in nearly 50% of all chemotherapeutic regimens
  • damaging DNA and cannot select between cancerous and non-cancerous cells
  • leading to a wide-range of side-effects from renal failure to neurotoxicity, ototoxicity, nausea and vomiting
  • the new iridium-based drug is specifically designed not to attack DNA,
  • growth
  • novel mechanism of action, meaning that it could not only dramatically slow down and halt cancer growth, but also significantly reduce the side effects
  • This research could also lead to substantial improvements in cancer survival rates
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ScienceShot: Small World Spotted Far Beyond Pluto | Science/AAAS | News - 0 views

  • The object journeys 80 to 452 AU from the sun, never approaching Neptune (30 AU) or Pluto (39.5 AU).
  • The new world is roughly 450 kilometers across, just one-fifth Pluto's diameter
  • If Pluto were as big as a basketball, Sedna would be a softball and the new world a mere golf ball
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  • Pluto orbits the sun every 248 years, the new world requires 4340 years and Sedna 12,600 years to do the same
  • Both Sedna and its small sidekick probably belong to the inner part of the Oort cloud,
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New Dwarf Planet Has Most Distant Trajectory Known - Scientific American - 0 views

  • Astronomers have discovered a probable dwarf planet that orbits the Sun far beyond Pluto
  • Together with Sedna, a similar extreme object discovered a decade ago, the find is reshaping ideas about how the Solar System came to be
  • been searching for more objects like Sedna for more than 10 years now.
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  • Finding another one like it reduces the chances that Sedna is a fluke
  • astronomers now have to come up with ideas to explain how these objects remain tightly gravitationally bound to the Sun when they orbit so far away.
  • In several years time, after observations have pinned down its orbit, the scientists will submit a name for consideration by the International Astronomical Union (IAU)
  • The newfound object's official name is 2012 VP113, but the discovery team calls it VP for short, or just 'Biden' — after US Vice-President Joe Biden
  • the Kuiper belt, that includes Pluto. This region stretches from roughly 30 to 50 AU. And beyond that lies the Oort cloud, with Sedna at its inner edge and comets farther out.
  • Sedna never gets any closer to the Sun than 76 AU.
  • 2012 VP113, although still in the inner Oort cloud, is even more remote: at its closest, it is 80 AU away
  • been hunting for distant objects with the Dark Energy Camera, a 520-megapixel camera on the 4-meter Blanco telescope
  • in Chile
  • They captured 2012 VP113during their first observing run, in November 2012, on the fifth image of the hundreds they would eventually snap
  • For months they tracked the object, until its full orbit became more apparent
  • There are several competing ideas for how objects such as Sedna and 2012 VP113 got to where they are today
  • One leading hypothesis proposes that in the Solar System’s infancy, a nearby star gravitationally perturbed the coalescing system and dragged some fragments out towards the edge
  • Another possibility is that a massive rogue planet passed through at some point, kicking objects from the Kuiper belt outwards into the inner Oort cloud.
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Opportunity Rover Gets Power Boost from Wind Events on Mars - 0 views

  • Opportunity rover on Mars has gotten a 70% boost in power over the past few weeks
  • A good portion of that comes from the fact that its springtime in Mars’ southern hemisphere where Oppy now sits
  • so the Sun is now shining longer and higher in the sky.
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  • several recent gusts of wind – or perhaps small dust devils – have cleaned much of the dust off the rover’s solar panels.
  • The rover team reported that between Sols 3605 and 3606 (March 15 and March 16, 2014), there was a dust cleaning event
  • resulted in about a 10% improvement in power production to 574 watt-hours
  • another cleaning event this week has put the power output to 615 watt-hours.
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Mars Exploration Rover Mission: Press Releases - 0 views

  • The rover experienced a partial cleaning of dust from its solar panels
  • Combined, the seasonal effect and multiple dust-cleaning events have increased the amount of energy available each day from the rover's solar array by more than 70 percent compared with two months ago
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ESA Awakens Rosetta's Comet Lander - 0 views

  • ESA sent a wake-up call to the 100-kg (220-lb) lander riding aboard the Rosetta spacecraft
  • bringing it out of its nearly 33-month-long slumber and beginning its preparation for its upcoming
  • landing on the surface of a comet in November
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  • Rosetta, which awoke in January via a pre-programmed signal, Philae received a “personal wake-up call” from Earth, 655 million kilometers away.
  • A confirmation signal from the lander was received by ESA five and a half hours later
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April 2 - Today in Science History - Scientists born on April 2nd, died, and events - 0 views

  • Velcro
  • In 1978, Velcro, the hook-and-loop fastener, was released. It was developed by Swiss engineer Georges de Mestral, who noticed how thistle burrs clung to his clothing during a hike in the mountains. Using a microscope, he discovered their natural hook-like shape. From 1948, he worked with a local weaver from a textile plant to design a "locking tape". The important discovery was accidental - that nylon, when sewn under ultraviolet light, formed industructable hooks. Velcro uses two tapes, one with stiff "hooks" like the burrs which clings to the second tape with soft "loops" like the fabric of his pants. The trademarked name Velcro comes from "vel" or velvet and "cro" from the French word crochet which means hook
  • First photo of sun
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  • In 1845, the first surviving daguerrotype photograph showing details of the sun was taken by French physicists Armand Fizeau and Léon Foucault. The 5-inch (12 cm) image had an exposure of 1/60 second, and showed the umbra/penumbra structure of several sunspots, as well as limb darkening. The photographic process was new: Daguerre perfected the daguerrotype only a few years earlier, in 1838. Fizeau and Foucault had been collaborating with their own experiments on the process since 1839. Fizeau had much improved the durability of a daguerrotype image with a treatment, published in Aug 1840, using a solution of chloride of gold mixed with hypo-sulphite of soda, then heated over a spirit-lamp
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April 6 - Today in Science History - Scientists born on April 6th, died, and events - 0 views

  • Teflon
  • In 1938, Du Pont researcher Roy J. Plunkett and his technician Jack Rebok accidentally discovered the chemical compound polytetrafluoroethylene (PTFE), later marketed as Teflon. Plunkett was researching chemical reactions of the gas perfluoroethylene in order to synthesize new types of refrigerant gases. Rebok found an apparently defective cylinder of this gas, since no pressure was found when the valve was opened, even though the cyclinder weight was the same as full cylinders. Rebok suggested sawing it open to investigate. Inside was a slippery white powder. Plunkett found it had unusual properties, a wonderful solid lubricant in powdered form, was chemically inert and had a very high melting point. He realized it was formed by an unexpected polymerization. It was patented on 4 Feb 1941
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April 4 - Today in Science History - Scientists born on April 4th, died, and events - 0 views

  • Challenger
  • Mrs Potts sad iron
  • In 1983, the space shuttle Challenger roared into orbit on its maiden voyage. It was named after the British Naval research vessel HMS Challenger that sailed the Atlantic and Pacific oceans during the 1870's. Challenger joined the NASA fleet of reusable winged spaceships and flew nine successful Space Shuttle missions. But on 28 Jan 1986, its tenth launch, the Challenger and its crew of seven were lost 73 seconds after launch when a booster failure resulted in the breakup of the vehicle
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  • In 1871, Mary Florence Potts of Ottumwa, Iowa patented the "Mrs. Potts' sad iron (No.113,448). The invention is a detachable handle for pressing irons. Thus a person could heat a number of iron bodies on a stove, using each in turn with one handle. It was widely manufactured and licensed in the U.S. and Europe with advertising featuring her picture. The body of the iron was cast hollow and was later filled with an insulating material, such as plaster of Paris, cement or clay. Mrs. Potts claimed in her patent that this material held the heat longer so that more garments could be ironed without reheating the iron. Three irons, one handle and one stand were sold as a set. Mrs. Potts' iron is well known by antique dealers and collectors
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April 3 - Today in Science History - Scientists born on April 3rd, died, and events - 0 views

  • First cell phone call
  • In 1973, the first portable phone call was placed by inventor Martin Cooper. The phone was 10 inches in height, 3 inches deep and an inch-and-a-half wide and weighed 30-oz. Since then, cell phones have shrunk to a mere palm-size weighing 4-oz, and are used by a billion people around the world. Cooper's first ''shoebox'' phone replaced a car phone of the time that weighed more than 30 pounds and cost thousands of dollars. A car phone owner had to drill a hole in his car to install the antenna and most of the phone sat in the trunk. A control unit with a handset was placed inside the car
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