Slashdot videos: Now with more Slashdot!

  • View

  • Discuss

  • Share

We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).

×
Earth

Doomsday Vault: First Tree Samples Arrive At Underground Seed Store 55

Posted by samzenpus
from the last-hope dept.
An anonymous reader writes "The Svalbard Global Seed Vault, built into an Arctic mountain, received its first delivery of tree seeds. Opened in 2008, the vault is designed to withstand all natural and human disasters. From the article: "The 'doomsday' vault built into an Arctic mountain, which stores seeds for food crops in case of a natural disaster, has received its first delivery of tree samples. Norway spruce and Scots pine seeds have arrived at the frozen vault, which is located on Svalbard, an archipelago owned by and north of Norway. The organizations behind the vault hope to bring more seeds from outside of the Nordic countries. The Svalbard Global Seed Vault will now look after the samples and use them to monitor how natural forests change. They will also keep them as back-ups, in case any of the species are lost, and to see how the forests change during breeding."
United Kingdom

World's First Lagoon Power Plants Unveiled In UK 189

Posted by samzenpus
from the power-up dept.
AmiMoJo writes Plans to generate electricity from the world's first series of tidal lagoons have been unveiled in the UK. The six lagoons — four in Wales and one each in Somerset and Cumbria — will capture incoming and outgoing tides behind giant sea walls, and use the weight of the water to power turbines. The series of six lagoons could generate 8% of the UK's electricity for an investment of £12bn. Tidal Lagoon Power wants £168 per MWh hour for electricity in Swansea, reducing to £90-£95 per MWh for power from a second, more efficient lagoon in Cardiff. The £90 figure compares favorably with the £92.50 price for power from the planned Hinkley nuclear station, especially as the lagoon is designed to last 120 years — at a much lower risk than nuclear. Unlike power from the sun and wind, tidal power is predictable. Turbines capture energy from two incoming and two outgoing tides a day, and are expected to be active for an average of 14 hours a day. Friends of the Earth Cymru, said the group is broadly in favor of the Swansea lagoon.
Math

Statistical Mechanics Finds Best Places To Hide During Zombie Apocalypse 244

Posted by samzenpus
from the all-we-wanna-do-is-eat-your-brains dept.
HughPickens.com writes Eric Mack reports at Cnet that a team of researchers at Cornell University, inspired by the book "World War Z" by Max Brooks, have used statistical-mechanics to model how an actual zombie outbreak might unfold and determined the best long-term strategy for surviving the walking dead: Head for the hills. Specifically, you should probably get familiar now with the general location of Glacier National Park so that when it all goes down, you can start heading in that direction. The project started with differential equations to model a fully connected population, then moved on to lattice-based models, and ended with a full US-scale simulation of an outbreak across the continental US. "At their heart, the simulations are akin to modeling chemical reactions taking place between different elements and, in this case, we have four states a person can be in--human," says Alex Alemi, "infected, zombie, or dead zombie--with approximately 300 million people."

Alemi believes cities would succumb to the zombie scourge quickly, but the infection rate would slow down significantly in more sparsely populated areas and could take months to reach places like the Northern Rockies and Glacier National Park. "Given the dynamics of the disease, once the zombies invade more sparsely populated areas, the whole outbreak slows down--there are fewer humans to bite, so you start creating zombies at a slower rate," Alemi says. Once you hit Montana and Idaho, you might as well keep heading farther north into the Canadian Rockies and all the way up to Alaska where data analysis shows you're most likely to survive the zombie apocalypse. The state with the lowest survival rate? — New Jersey. Unfortunately a full scale simulation of an outbreak in the United States shows that for `realistic' parameters, we are largely doomed.
Space

SpaceX Falcon 9 Launches Dual Satellite Mission 23

Posted by samzenpus
from the up-up-and-away dept.
JoeSilva writes SpaceX successfully launched two satellites towards Geosynchronous Orbit. There's already a video of one deployment. Word is the launch went very smoothly and bodes well for their next launch in three weeks, as they work to fulfill what is now a very full launch manifest. In addition Elon had one more thing to share: "Upgrades in the works to allow landing for geo missions: thrust +15%, deep cryo oxygen, upper stage tank vol +10%."
Google

Google Wants To Rank Websites Based On Facts Not Links 375

Posted by samzenpus
from the just-the-facts dept.
wabrandsma writes about Google's new system for ranking the truthfulness of a webpage. "Google's search engine currently uses the number of incoming links to a web page as a proxy for quality, determining where it appears in search results. So pages that many other sites link to are ranked higher. This system has brought us the search engine as we know it today, but the downside is that websites full of misinformation can rise up the rankings, if enough people link to them. Google research team is adapting that model to measure the trustworthiness of a page, rather than its reputation across the web. Instead of counting incoming links, the system – which is not yet live – counts the number of incorrect facts within a page. 'A source that has few false facts is considered to be trustworthy,' says the team. The score they compute for each page is its Knowledge-Based Trust score. The software works by tapping into the Knowledge Vault, the vast store of facts that Google has pulled off the internet. Facts the web unanimously agrees on are considered a reasonable proxy for truth. Web pages that contain contradictory information are bumped down the rankings."
Space

20-Year-Old Military Weather Satellite Explodes In Orbit 253

Posted by samzenpus
from the go-boom dept.
schwit1 writes A 20-year-old U.S. military weather satellite apparently exploded for no obvious reason. The incident has put several dozen pieces of space junk into orbit. From the article: "A 20-year-old military weather satellite apparently exploded in orbit Feb. 3 following what the U.S. Air Force described as a sudden temperature spike. The “catastrophic event” produced 43 pieces of space debris, according to Air Force Space Command, which disclosed the loss of the satellite Feb. 27 in response to questions from SpaceNews. The satellite, Defense Meteorological Satellite Program Flight 13, was the oldest continuously operational satellite in the DMSP weather constellation."
ISS

Spacewalking Astronauts Finish Extensive, Tricky Cable Job 22

Posted by samzenpus
from the good-work-larry dept.
An anonymous reader writes news about a three-day cable job completed outside the International Space Station. "Spacewalking astronauts successfully completed a three-day cable job outside the International Space Station on Sunday, routing several-hundred feet of power and data lines for new crew capsules commissioned by NASA. It was the third spacewalk in just over a week for Americans Terry Virts and Butch Wilmore, and the quickest succession of spacewalks since NASA's former shuttle days. The advance work was needed for the manned spacecraft under development by Boeing and SpaceX. A pair of docking ports will fly up later this year, followed by the capsules themselves, with astronauts aboard, in 2017."
Technology

Physicists May Be One Step Closer To Explaining High-Temp Superconductivity 58

Posted by samzenpus
from the it's-getting-hot-in-here dept.
sciencehabit writes For years some physicists have been hoping to crack the mystery of high-temperature superconductivity—the ability of some complex materials to carry electricity without resistance at temperatures high above absolute zero—by simulating crystals with patterns of laser light and individual atoms. Now, a team has taken—almost—the next-to-last step in such 'optical lattice' simulation by reproducing the pattern of magnetism seen in high-temperature superconductors from which the resistance-free flow of electricity emerges.
Medicine

Research Suggests That Saunas Help You Live Longer 207

Posted by samzenpus
from the sweat-it-out dept.
jones_supa writes A study of Finnish men suggests that frequent sauna baths may help you live longer. Previous research has suggested that saunas might improve blood vessel function and exercise capacity, or even lower blood pressure in patients with hypertension. The new study links long, hot sauna baths with more benefits, including fewer deaths from heart attacks, strokes, various heart-related conditions and other causes. The study tracked 2315 Finnish men for nearly 20 years on average. Most participants used saunas at least once weekly. Those who used them four to seven times weekly received the greatest benefits. The study published in JAMA Internal Medicine wraps up by saying that further studies are warranted to establish the potential mechanism that links sauna bathing and the aforementioned cardiovascular benefits.
Music

Genetic Data Analysis Tools Reveal How US Pop Music Evolved 57

Posted by Soulskill
from the anatomy-of-a-train-wreck dept.
KentuckyFC writes: The history of pop music is rich in anecdotes, folklore and controversy. But despite the keen interest, there is little in the form of hard evidence to back up most claims about the evolution of music. Now a group of researchers have used data analysis tools developed for genomic number crunching to study the evolution of U.S. pop music. The team studied 30-second segments of more than 17,000 songs that appeared on the U.S. Billboard Hot 100 between 1960 and 2010. Their tools categorized the songs according to harmonic features such as chord changes as well as the quality of timbre such as whether guitar-based, piano-based orchestra-based and so on. They then used a standard algorithm for discovering clusters within networks of data to group the songs into 13 different types, which turned out to correspond with well known genres such as rap, rock, country and so on. Finally, they plotted the change in popularity of these musical types over time.

The results show a clear decline in the popularity of jazz and blues since 1960. During the same period, rock-related music has ebbed and flowed in popularity. By contrast, rap was rare before 1980 before becoming the dominant musical style for 30 years until declining in the late 2000s. The work answers several important question about the evolution of pop music, such as whether music industry practices have led to a decline in the cultural variety of new music, and whether British bands such as The Beatles and The Rolling Stones triggered the 1964 American music revolution [spoiler: no in both cases].
Space

One Astronomer's Quest To Reinstate Pluto As a Planet 190

Posted by Soulskill
from the emotional-investment-in-nouns dept.
sarahnaomi writes: Most of us grew up believing that tiny, distant Pluto was the outermost planet in our solar system. Then, one day, the scientific powers that be decreed that it wasn't. But it seems the matter is far from settled. David Weintraub—who describes Pluto's exile as a stunt organized by a "very small clique of Pluto-haters"—would have the dwarf world rejoin the ranks of our Solar System's fully-fledged planets today. But solid evidence that Pluto deserves the title may come in July, when NASA's New Horizons spacecraft slingshots around the icy rock and sends us back a detailed picture of its composition. Pluto's planethood was revoked by majority vote on the final day of the 2006 IAU conference. Over 2,500 astronomers attended the meeting throughout the week, but only 394 votes ultimately decided Pluto's fate: 237 in favor of demoting the planet and 157 against.
Earth

Mysterious Siberian Crater Is Just One of Many 88

Posted by Soulskill
from the watch-out-for-exploding-earth dept.
New submitter Sardaukar86 sends this excerpt from a Washington Post report: In the middle of last summer came news of a bizarre occurrence no one could explain. Seemingly out of nowhere, a massive crater appeared in one of the planet's most inhospitable lands. Early estimates said the crater, nestled in a land called "the ends of the Earth" where temperatures can sink far below zero, yawned nearly 100 feet in diameter. The saga deepened. The Siberian crater wasn't alone. There were two more, ratcheting up the tension in a drama that hit its climax as a probable explanation surfaced. Global warming had thawed the permafrost, which had caused methane trapped inside the icy ground to explode.

Now, however, researchers fear there are more craters than anyone knew — and the repercussions could be huge. Russian scientists have now spotted a total of seven craters, five of which are in the Yamal Peninsula. Two of those holes have since turned into lakes. And one giant crater is rimmed by a ring of at least 20 mini-craters, the Siberian Times reported.
Earth

Methane-Based Life Possible On Titan 69

Posted by Soulskill
from the it's-life-jim-but-not-as-we-know dept.
Randym writes: With the simultaneous announcement of a possible nitrogen-based, cell-like structure allowing life outside the "liquid water zone" (but within a methane atmosphere) announced by researchers at Cornell (academic paper) and the mystery of fluctuating methane levels on Mars raising the possibility of methane-respiring life, there now exists the possibility of a whole new branch of the tree of life that does not rely on either carbon or oxygen for respiration. We may find evidence of such life here on Earth down in the mantle where "traditional" life cannot survive, but where bacteria has evolved to live off hydrocarbons like methane and benzene.
Science

Is That Dress White and Gold Or Blue and Black? 419

Posted by timothy
from the enoy-your-lovely-ochre-sky dept.
HughPickens.com writes Color scientists already have a word for it: Dressgate. Now the Washington Post reports that a puzzling thing happened on Thursday night consuming millions — perhaps tens of millions — across the planet and trending on Twitter ahead of even Jihadi John's identification. The problem was this: Roughly three-fourths of people swore that this dress was white and gold, according to BuzzFeed polling but everyone else said it's dress was blue. Others said the dress could actually change colors. So what's going on? According to the NYT our eyes are able to assign fixed colors to objects under widely different lighting conditions. This ability is called color constancy. But the photograph doesn't give many clues about the ambient light in the room. Is the background bright and the dress in shadow? Or is the whole room bright and all the colors are washed out? If you think the dress is in shadow, your brain may remove the blue cast and perceive the dress as being white and gold. If you think the dress is being washed out by bright light, your brain may perceive the dress as a darker blue and black.

According to Beau Lotto, the brain is doing something remarkable and that's why people are so fascinated by this dress. "It's entertaining two realities that are mutually exclusive. It's seeing one reality, but knowing there's another reality. So you're becoming an observer of yourself. You're having tremendous insight into what it is to be human. And that's the basis of imagination." As usual xkcd has the final word.
It would make the comments more informatively scannable if you include your perceived color pair in the title of any comments below.
Earth

We Stopped At Two Nuclear Bombs; We Can Stop At Two Degrees. 340

Posted by timothy
from the ok-but-where-to-buy-the-best-grazing-land dept.
Lasrick writes Dawn Stover writes in the Bulletin of the Atomic Scientists that climate change is irreversible but not unstoppable. She describes the changes that are happening already and also those likely to happen, and compares what is coming to the climate of the Pliocene: 'Even if countries reduce emissions enough to keep temperatures from rising much above the internationally agreed-upon "danger" threshold of 2 degrees Celsius (which seems increasingly unlikely), we can still look forward to conditions similar to those of the mid-Pliocene epoch of 3 million years ago. At that time, the continents were in much the same positions that they are today, carbon dioxide levels ranged between 350 and 400 ppm, the global average temperature was 2 to 3 degrees Celsius higher than it is today (but up to 20 degrees higher than today at the northernmost latitudes), the global sea level was about 25 meters higher, and most of today's North American forests were grasslands and savanna.' Stover agrees with two scientists published in Nature Geoscience that 'Future warming is therefore driven by socio-economic inertia," and points the way toward changing a Pliocene future.
Mars

Adjusting To a Martian Day More Difficult Than Expected 135

Posted by Soulskill
from the not-as-bad-as-adjusting-to-a-neptunian-day dept.
schwit1 writes: Research and actual experience have found that adjusting to the slightly longer Martian day is not as easy as you would think. "If you're on Mars, or at least work by a Mars clock, you have to figure out how to put up with the exhausting challenge of those extra 40 minutes. To be exact, the Martian day is 24 hours, 39 minutes, and 35 seconds long, a length of day that doesn't coincide with the human body's natural rhythms. Scientists, Mars rover drivers, and everyone else in the space community call the Martian day a "sol" to differentiate it from an Earth day. While it doesn't seem like a big difference, that extra time adds up pretty quickly. It's like heading west by two time zones every three days. Call it 'rocket lag.'"
Medicine

Banned Weight-loss Drug Could Combat Liver Disease, Diabetes 77

Posted by Soulskill
from the things-that-were-good-but-then-bad-but-then-good dept.
sciencehabit writes: A drug the U.S. government once branded "extremely dangerous and not fit for human consumption" deserves a second chance, a study of rats suggests. Researchers report (abstract) that a slow-release version of the compound reverses diabetes and nonalcoholic fatty liver disease (NAFLD), an untreatable condition that can lead to cirrhosis and liver cancer.
Medicine

Surgeon: First Human Head Transplant May Be Just Two Years Away 210

Posted by samzenpus
from the brand-new-chassis dept.
HughPickens.com (3830033) writes "Michelle Star writes at C/net that Surgeon Sergio Canavero, director of the Turin Advanced Neuromodulation Group in Italy, believes he has developed a technique to remove the head from a non-functioning body and transplant it onto the healthy body. According to Canavero's paper published in Surgical Neurology International, first, both the transplant head and the donor body need to be cooled in order to slow cell death. Then, the neck of both would be cut and the major blood vessels linked with tubes. Finally, the spinal cords would be severed, with as clean a cut as possible. Joining the spinal cords, with the tightly packed nerves inside, is key. The plan involves flushing the area with polyethylene glycol, followed by several hours of injections of the same, a chemical that encourages the fat in cell membranes to mesh. The blood vessels, muscles and skin would then be sutured and the patient would be induced into a coma for several weeks to keep them from moving around; meanwhile, electrodes would stimulate the spine with electricity in an attempt to strengthen the new nerve connections.

Head transplants has been tried before. In 1970, Robert White led a team at Case Western Reserve University in Cleveland, US, that tried to transplant the head of one monkey on to the body of another. The surgeons stopped short of a full spinal cord transfer, so the monkey could not move its body. Despite Canavero's enthusiasm, many surgeons and neuroscientists believe massive technical hurdles push full body transplants into the distant future. The starkest problem is that no one knows how to reconnect spinal nerves and make them work again. "This is such an overwhelming project, the possibility of it happening is very unlikely," says Harry Goldsmith."
Biotech

Xeroxed Gene May Have Paved the Way For Large Human Brain 93

Posted by samzenpus
from the look-at-the-big-brain-on-test-subject-35 dept.
sciencehabit writes Last week, researchers expanded the size of the mouse brain by giving rodents a piece of human DNA. Now another team has topped that feat, pinpointing a human gene that not only grows the mouse brain but also gives it the distinctive folds found in primate brains. The work suggests that scientists are finally beginning to unravel some of the evolutionary steps that boosted the cognitive powers of our species. "This study represents a major milestone in our understanding of the developmental emergence of human uniqueness," says Victor Borrell Franco, a neurobiologist at the Institute of Neurosciences in Alicante, Spain, who was not involved with the work.
Space

12-Billion-Solar-Mass Black Hole Discovered 139

Posted by Soulskill
from the go-big-or-go-home dept.
sciencehabit writes: A team of astronomers has discovered what is, in galactic terms, a monstrous baby: a gigantic black hole of 12 billion solar masses in a barely newborn galaxy, just 875 million years after the big bang. It's roughly 3000 times the size of our Milky Way's central black hole. To have grown to such a size in so short a time, it must have been munching matter at close to the maximum physically possible rate for most of its existence. Its large size and rate of consumption also makes it the brightest object in that distant era, and astronomers can use its bright light to study the composition of the early universe: how much of the original hydrogen and helium from the big bang had been forged into heavier elements in the furnaces of stars.