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Posts Tagged ‘evidence’

Scientists Breed Big-Brained Guppies To Demonstrate Evolution’s Trade-Offs

January 4th, 2013 01:55 admin View Comments

Science

An anonymous reader writes “Scientists have long suspected that big brains come with an evolutionary price — but now they’ve published the first experimental evidence to support that suspicion, based on their efforts to breed big-brained fish. A Swedish team found it relatively easy to select and interbreed common guppies to produce bigger (or smaller) brains — as much as 9.3 percent bigger, to be precise (abstract). But the bigger-brained fish also tended to have smaller guts and produce fewer babies.”

Source: Scientists Breed Big-Brained Guppies To Demonstrate Evolution’s Trade-Offs

Book Review: Burdens of Proof

December 24th, 2012 12:11 admin View Comments

Books

benrothke writes “When the IBM PC first came out 31 years ago, it supported a maximum of 256KB RAM. You can buy an equivalent computer today with substantially more CPU power at a fraction of the price. But in those 31 years, the information security functionality in which the PC operates has not progressed accordingly. In Burdens of Proof: Cryptographic Culture and Evidence Law in the Age of Electronic Documents, author Jean-François Blanchette observes that the move to a paperless society means that paper-based evidence needs to be recreated in the digital world. It also requires an underlying security functionality to flow seamlessly across organizations, government agencies and the like. While the computing power is there, the ability to create a seamless cryptographic culture is much slower in coming.” Keep reading for the rest of Ben’s review.

Burdens of Proof: Cryptographic Culture and Evidence Law in the Age of Electronic Documents
author Jean-François Blanchette
pages 288
publisher MIT Press
rating 9/10
reviewer Ben Rothke
ISBN 978-0262017510
summary Excellent overview and history of using cryptography to build a trust framework

Source: Book Review: Burdens of Proof

Your Hands Were Made For Punching According To New Study

December 20th, 2012 12:42 admin View Comments

Idle

They are capable of delicate surgery, creating beautiful works of art, and comforting someone feeling down, but according to a new study your hands evolved to smash someone in the face. From the article: “Human hands evolved so that men could make fists and fight, and not just for manual dexterity, new research finds. The study, published in the Journal of Experimental Biology, adds to a growing body of evidence that humans are among the most aggressive and violent animals on the planet. “With the notable exception of bonobos, great apes are a relatively aggressive group of mammals,” lead author David Carrier told Discovery News. “Although some primatologists may argue that chimpanzees are the most aggressive apes, I think the evidence suggests that humans are substantially more violent.”‘”

Source: Your Hands Were Made For Punching According To New Study

Humans Have Been Eating Cheese For At Least 7,500 Years

December 13th, 2012 12:54 admin View Comments

Earth

An anonymous reader writes “Researchers have found conclusive evidence for the first time that humans have been making cheese since the 6th millennium BC.”

Source: Humans Have Been Eating Cheese For At Least 7,500 Years

Engineers Use Electrical Hum To Fight Crime

December 12th, 2012 12:58 admin View Comments

Science

Hugh Pickens writes writes “A suspected terrorist has been taped planning a deadly attack and the police want to use this evidence in court, or someone has been captured on CCTV threatening an assault. Increasingly, recordings like these are playing a role in criminal investigations, but how can the police be sure that the audio evidence is genuine and has not been cleverly edited? Now Rebecca Morelle writes on BBC that a technique known as Electric Network Frequency (ENF) analysis is helping forensic scientists separate genuine, unedited recordings from those that have been tampered with and the technique has already been used in court. Any digital recording made near an electrical power source will pick up noise from the grid that will be embedded throughout the audio. This buzz is an annoyance for sound engineers trying to make the highest quality recordings, but for forensic experts, it has turned out to be an invaluable tool in the fight against crime. Due to unbalances in production and consumption of electrical energy, the ENF is known to fluctuate slightly over time rather than being stuck to its exact set point so if you look at the frequency over time, you can see minute fluctuations and the pattern of these random changes in frequency is unique over time providing a digital watermark on every recording. Forensic Scientist Philip Harrison has been logging the hum on the national grid in the UK for several years. ‘Even if [the hum] is picked up at a very low level that you cannot hear, we can extract this information,’ says Dr. Harrison. ‘If we have we can extract [the hum] and compare it with the database, if it is a continuous recording, it will all match up nicely.’”

Source: Engineers Use Electrical Hum To Fight Crime

MESSENGER Probe Finds Strong Evidence of Ice On Mercury

November 29th, 2012 11:52 admin View Comments

NASA

The Bad Astronomer writes “Just in time for the holiday season, the NASA space probe MESSENGER appears to have all but confirmed the existence of ice at Mercury’s north pole. Ice has long been suspected to be hiding in permanently shadowed areas in deep craters at the planet’s pole, but new data show several converging lines of evidence (thermal and visible light mapping, radar, neutron emission) that as much as a trillion tons of ice may be buried just centimeters deep under the surface. Scientists also see evidence of organic (carbon-based) molecules as well. That’s not life, but it’s more of an indication that volatile compounds can exist on the solar system’s innermost planet.” Further, astroengine writes “New results from the MESSENGER spacecraft not only confirm that the planet closest to the sun has ice inside shaded craters near the north pole, but that a thin layer of very dark organic material seems to be covering a good part of the frozen water. Both likely arrived via comets or asteroids millions — or hundreds of millions — of years ago.”

Source: MESSENGER Probe Finds Strong Evidence of Ice On Mercury

Hairspray Could Help Us Find Advanced Alien Civilizations

November 27th, 2012 11:03 admin View Comments

Space

Hugh Pickens writes “Charles Q. Choi reports that hairspray could one day serve as the sign that aliens have reshaped distant worlds because one group of gases that might be key to terraforming planets are CFCs. ‘Our hypothesis is that evidence of intelligent life might be evident in a planetary atmosphere,’ says astrobiologist Mark Claire at the Blue Marble Space Institute of Science. CFCs are entirely artificial, with no known natural process capable of creating them in atmospheres. Detecting signs of these gases on far-off worlds with telescopes might serve as potent evidence that intelligent alien civilizations were the cause, either intentionally as part of terraforming or accidentally via industrial pollution. ‘An industrialized civilization will be one that will use its planetary resources for fabrication, the soon-to-be-detectable-from-Earth atmospheric byproducts of which could be a tell-tale sign of their activity,’ says astrobiologist Sanjoy Som. CFCs can be easily recognized in planetary atmospheres because their atmospheric ‘fingerprint’ (i.e. chemical spectra) is very different from natural elements, and are a tell-tale sign that life on the surface has advanced industrial capabilities. Using state-of-the-art computer models of atmospheric chemistry and climate, researchers plan to discover what visible signs CFCs and other artificial byproducts of alien terraforming or industry might have on exoplanet atmospheres. ‘We are about a decade away of being able to measure detailed compositions of the atmospheres of extrasolar planets,’ says Som.”

Source: Hairspray Could Help Us Find Advanced Alien Civilizations

Stalagmite Gives Further Evidence that Climate Change Contributed to Mayan Collapse

November 13th, 2012 11:21 admin View Comments

Evidence for Unconscious Math, Language Processing Abilities

November 13th, 2012 11:07 admin View Comments

Math

the_newsbeagle writes “It’s hard to determine what the unconscious brain is doing since, after all, we’re not aware of it. But in a neat set of experiments, researchers from the Hebrew University of Jerusalem’s consciousness lab found evidence that the unconscious brain can parse language and perform simple arithmetic. The researchers flashed colorful patterns at test subjects that took up all their attention and allowed for the subliminal presentation of sentences or equations. In the language processing experiment, researchers found that subjects became consciously aware of a sentence sooner if it was jarring and nonsensical (like, for example, the sentence ‘I ironed coffee’).”

Source: Evidence for Unconscious Math, Language Processing Abilities

Evidence for Unconscious Math, Language Processing Abilities

November 13th, 2012 11:07 admin View Comments

Math

the_newsbeagle writes “It’s hard to determine what the unconscious brain is doing since, after all, we’re not aware of it. But in a neat set of experiments, researchers from the Hebrew University of Jerusalem’s consciousness lab found evidence that the unconscious brain can parse language and perform simple arithmetic. The researchers flashed colorful patterns at test subjects that took up all their attention and allowed for the subliminal presentation of sentences or equations. In the language processing experiment, researchers found that subjects became consciously aware of a sentence sooner if it was jarring and nonsensical (like, for example, the sentence ‘I ironed coffee’).”

Source: Evidence for Unconscious Math, Language Processing Abilities

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