|
Loading...
|
|
|
Loading...
|
Mars More Like Earth Than Thought? New Details About History Of Water On Red PlanetNew details have emerged about the history of water on Mars, gleaned from the 2008 NASA Phoenix Mars Mission. Scientists found patterns in the ground near the lander, multi-sided shapes about three to ten meters in size. The shapes are created when the surface contracts and the ice cracks. Sand fills in the cracks before the ice expands and buckles the surface to make the distinctive patterns.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 3:00 am Police Work Undermines Cardiovascular Health, Comparison To General Population ShowsIt is well documented that police officers have a higher risk of developing heart disease: The question is why. In the most recent results coming out of one of the few long-term studies being conducted within this tightly knit society, researchers have determined that underlying the higher incidence of subclinical atherosclerosis -- arterial thickening that precedes a heart attack or stroke -- may be the stress of police work.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 3:00 am Triggering Muscle Development: A Therapeutic Cure For Muscle Wastage?Scientists have shown that if elderly men who were given growth hormone and exercised their legs showed an appreciable muscle mass increase. Researchers say, "This raises the question: Can age-related loss of muscle strength and increased fragility be ameliorated by the therapeutic application of mechano growth factor?"Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 3:00 am Overweight Kids Experience More Loneliness, AnxietyAs childhood obesity rates continue to increase, experts agree that more information is needed about the implications of being overweight as a step toward reversing current trends. A new study has found that overweight children, especially girls, show signs of the negative consequences of being overweight as early as kindergarten.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 3:00 am Methane-producing Molecule Can Also Repair DNAThe Archaea are single-celled organisms and a domain unto themselves, quite apart from the so called eukaryotes (bacteria and higher organisms). Many species live under extreme conditions, and carry out unique biochemical processes shared neither with bacteria nor with eukaryotes. Methanogenic archaeans, for example, can produce methane gas out of carbon dioxide and hydrogen.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 3:00 am Risk Of Liver Cancer In Women With Hepatitis B Virus Infection Varies With Number Of PregnanciesRisk for hepatocellular carcinoma, a primary malignancy of the liver, was statistically significantly higher among women with hepatitis B virus (HBV) infection than among women without the virus, according to a new study.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 3:00 am Predicting The Return Of Prostate Cancer: New Study Betters The Odds Of SuccessCancer experts say a study tracking 774 prostate cancer patients for a median of eight years has shown that a three-way combination of measurements has the best chance yet of predicting disease metastasis.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 12:00 am Alzheimer's Research Yields Potential Drug TargetScientists have found laboratory evidence that a cluster of peptides may be the toxic agent in Alzheimer's disease. Scientists say the discovery may lead to new drugs for the disease.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 12:00 am Human-like Brain Disturbances In Insects: Locusts Shed Light On Migraines, Stroke And EpilepsyA similarity in brain disturbance between insects and people suffering from migraines, stroke and epilepsy points the way toward new drug therapies to address these conditions.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 12:00 am What Drives Lung Cancer's Spread?A new study reveals the genetic underpinnings of what causes lung cancer to quickly metastasize, or spread, to the brain and the bone -- the two most prominent sites of lung cancer relapse.Source: ScienceDaily: Latest Science News | 4 Jul 2009 | 12:00 am Australian dinosaur that lived 98M years ago found (AP)
Source: Yahoo! News: Science News | 3 Jul 2009 | 11:27 am Indian FM urges 'ambitious but fair' climate targets (AFP)
Source: Yahoo! News: Science News | 3 Jul 2009 | 11:08 am News from Afar: My date with a volcanoA geologist describes how a plume of gas detected on Monday by a Nasa satellite brought him to one of the most remote regions on Earth to investigate a volcanic eruption I was sat at my desk in Oxford on Monday evening, half an eye on the tennis as Andy Murray battled to reach the Wimbledon quarter final, when an email alert popped up at the bottom of my screen: "Large sulphur dioxide cloud detected by satellite over north Africa; potential source - a volcanic eruption?" It was from Dr Tim Wright, a geophysicist at the University of Leeds and the leader of a research group investigating seismic and volcanic activity in the remote Afar region of Ethiopia, where two tectonic plates are being ripped apart. The plume of gas had been detected by a Nasa satellite. Although we have no other information yet on the source of the gas cloud there's a chance that this is the first indication that some of the magma we know lies beneath Afar has just blown its way to the surface. I frantically checked websites that publish data from satellites designed to measure the temperature of the Earth's surface. Though originally intended to look for forest fires, these are a godsend to geologists, who use them to spot the heat from new lava flows and volcanic eruptions. I clicked on the map of Ethiopia and as the image began to download, some small red dots appeared in the volcanic region we had been studying, indicating that there was something unusually hot on the surface. The source of the gas cloud now seemed clear and as Andy Murray hit his winning forehand my thoughts were a long way from Wimbledon. Less than 24 hours later, I was sitting on a plane bound for Addis Ababa, accompanied by a fellow PhD student and carrying some hastily assembled equipment, which we hope to use to investigate the eruption in cooperation with scientists from Addis Ababa University and the Ethiopian Geological Survey. Afar is a wild and remote region in the northern part of Ethiopia and an area with some of the most intense seismic and volcanic activity in the world, a result of the Earth's crust being ripped apart by the movement of tectonic plates. However, most of the magma that forces its way upwards into the crust never reaches the surface, so we don't want to miss this rare chance to study an eruption as it happens. Leaving for Ethiopia at just a few hours' notice was a scramble, but the real challenge began when we landed in Addis Ababa and tried to make arrangements to get to one of the remotest places on Earth as quickly as possible. Travelling overland would involve a drive in 4x4 vehicles and then a hike with camels when the terrain becomes too rough to drive, which in all would take four days at least. The only way to get there in time was to fly, and this meant persuading the Ethiopian army to give us a lift. After our overnight flight, and with only a few hours' sleep between us, we made our way to the University of Addis Ababa where our Ethiopian colleagues had already begun the difficult task of convincing the military to take us to the eruption. After readying our equipment there was nothing more to do but wait and as Wednesday evening came with still no news, we began to wonder if our trip had been in vain. The negotiations were continuing yesterday morning, the Ethiopian scientists shuttling between government departments trying to convince them of the value of our trip. We obsessively checked and re-checked our equipment. There was really nothing else to do. But then late yesterday afternoon the hard work finally paid off. On Friday at 5am we will be leaving Addis to fly by military helicopter to Afar where, unless we're already too late, we will witness a volcanic eruption. David Ferguson is a geology PhD student at Oxford University. We'll be publishing updates on their progress in the coming days guardian.co.uk © Guardian News & Media Limited 2009 | Use of this content is subject to our Terms & Conditions | More Feeds
Source: Science news, comment and analysis | guardian.co.uk | 3 Jul 2009 | 10:58 am Australia discovers 3 new large dinosaursSYDNEY (Reuters) - Fossils of three new species of dinosaurs have been discovered in Australia, including a meat-eater larger than Velociraptor from the Jurassic Park movies, suggesting Australia may have a more complex prehistoric past.Source: Reuters: Science News | 3 Jul 2009 | 10:03 am A sanctuary threatenedThe BBC's Gary Duffy assesses the future the Brazilian Pantanal, one of the World's largest freshwater wetlands.Source: BBC News | Science & Environment | UK Edition | 3 Jul 2009 | 9:54 am Three new dinosaur species found in Australia (AFP)
Source: Yahoo! News: Science News | 3 Jul 2009 | 9:11 am The Nation's weather (AP)
Source: Yahoo! News: Science News | 3 Jul 2009 | 8:59 am Moon probe returns first imagesThe US space agency's Lunar Reconnaissance Orbiter spacecraft sends back its first images since reaching the Moon.Source: BBC News | Science & Environment | UK Edition | 3 Jul 2009 | 8:55 am Plant disease hits eastern US veggies early, hard (AP)AP - Tomato plants have been removed from stores in half a dozen states as a destructive and infectious plant disease makes its earliest and most widespread appearance ever in the eastern United States.Source: Yahoo! News: Science News | 3 Jul 2009 | 8:03 am Australia discovers 3 new large dinosaurs (Reuters)
Source: Yahoo! News: Science News | 3 Jul 2009 | 7:51 am Japan may add noise to quiet hybrid cars for safety (AFP)
Source: Yahoo! News: Science News | 3 Jul 2009 | 6:05 am New dinosaurs found in AustraliaThree new dinosaur species are found in Queensland, Australia, and named after the Outback song Waltzing Matilda.Source: BBC News | Science & Environment | UK Edition | 3 Jul 2009 | 4:48 am New Moon Orbiter Sends First Lunar Snapshots (SPACE.com)SPACE.com - NASA's newest spacecraft in orbit around the moon has sent its first snapshots of the lunar surface.Source: Yahoo! News: Science News | 3 Jul 2009 | 2:01 am Traffic Heats Up at Space Station (SPACE.com)SPACE.com - Three crewmembers of the International Space Station took a short trip aboard their Soyuz lifeboat late Thursday as traffic heats up at the orbital outpost.Source: Yahoo! News: Science News | 3 Jul 2009 | 12:15 am Opposition wants climate change action from Ottawa (AFP)
Source: Yahoo! News: Science News | 2 Jul 2009 | 11:40 pm Space ambitionsUS moonwalker Buzz Aldrin looks to new frontiersSource: BBC News | Science & Environment | UK Edition | 2 Jul 2009 | 11:03 pm Astronauts train for the moonFootage shot just weeks before the moon landing shows Armstrong and Aldrin practising in their cumbersome spacesuits
Source: Science news, comment and analysis | guardian.co.uk | 2 Jul 2009 | 11:03 pm The Strange Ingredients in FireworksInside, there are some odd ingredients, from aluminum to Vaseline.Source: Livescience.com | 2 Jul 2009 | 8:41 pm Penguin Parents Won’t Chip In to Help Handicapped Spouse
Tired of your partner not helping out with the kids after you’ve had a tough day at work? At least you’re not a handicapped penguin parent trying to fish with a Plexiglas box strapped to your back. Penguin pairs are known for their elaborate collaboration in raising chicks under harsh Antarctic conditions. But it turns out penguins will take teamwork only so far. When French scientists handicapped one bird from each of 46 pairs of Adélie penguins, partners of the unlucky birds didn’t step up to help out their mates, or to provide extra food for their chicks. “In Adélie penguins, when one mate was handicapped, no compensatory care was observed from the partner,” researchers from the Institut Pluridisciplinaire Hubert Curien reported Tuesday in Animal Behaviour. “As a consequence, handicapped individuals and offspring both supported the whole additional breeding cost of the handicap.”
To study the effects of a handicap on pair cooperation, the researchers chose one unlucky bird from each penguin pair and attached a small Plexiglas box to its middle-back feathers. Similar to the first-generation tracking devices used by penguin researchers in the 1990s, the boxes were designed to increase underwater drag during diving and fishing, but not to interfere with the penguins’ other activities. “According to previous studies, we could guess what the potential effects of the dummy devices would be on handicapped penguins, but not on their partner or their chicks,” animal ecologist Michael Beaulieu, a co-author on the study, wrote in an e-mail.
As expected, the handicapped penguins spent more time hunting at sea and came back with less food for their chicks. But instead of helping out, partners of the handicapped birds essentially ignored the plight of their unlucky mates. Partner penguins didn’t compensate by spending more time foraging for food or bringing back extra fish. And at the end of the study, while both handicapped birds and their chicks weighed less than their unhindered counterparts, the handicap-free partners stayed fat and happy. It’s tempting to blame penguin partners for their negligence and insensitivity, especially because similar handicap studies in other species have shown that some birds, including passerines and great tits, do compensate for their mate’s deficiencies. But Beaulieu has a different explanation: Because penguins are long-lived birds, it doesn’t make evolutionary sense for them to invest too much effort in any single reproductive season. “Short-lived birds have only a few breeding attempts during their lifetime while long-lived birds have a lot,” he said. “As a result, short-lived birds are expected to give the maximum during one breeding season to increase the probability of survival of their current chicks.” Long-lived birds, on the other hand, should prioritize their own long-term survival over the outcome of individual chicks. “Consequently, when the investment of the partner decreases,” Beaulieu said, “short-lived birds are expected to compensate while long-lived birds are expected to keep a fixed level of parental investment.” The evolutionary explanation makes sense, but there’s one other possible explanation: It appears that male penguins don’t have great communication skills. Handicapped dads didn’t convey their distress to females after returning from a hunt, and when mom came back squawking about her feeding troubles, dad didn’t listen. “If you do not ask for help, I will not help you,” Beaulieu said. “That may also explain why they did not compensate.”
Images: Michael Beaulieu
Source: Wired: Wired Science | 2 Jul 2009 | 8:30 pm Loss of world's seagrass beds seen acceleratingMIAMI (Reuters) - The world's seagrass meadows, a critical habitat for marine life and profit-maker for the fishing industry, are in decline due to coastal development and the losses are accelerating, according to a new study.Source: Reuters: Science News | 2 Jul 2009 | 8:24 pm Final momentsHow Air France debris gives clues to jet's break-upSource: BBC News | Science & Environment | UK Edition | 2 Jul 2009 | 8:03 pm Climate change is shrinking sheepClimate change is causing a breed of wild sheep in Scotland to shrink, according to research in the journal Science.Source: BBC News | Science & Environment | UK Edition | 2 Jul 2009 | 6:38 pm Lunar Probe Sends First High-Res Images
NASA’s Lunar Reconnaissance Orbiter sent its first images back to Earth after activating its cameras June 30. The LRO has both a low-resolution wide-angle camera and a high-resolution camera. These shots were taken at the boundary between night and day, capturing shadows that exaggerate the terrain. Though the surface appears very rough, it is actually similar to the highland area where Apollo 16 landed and explored with a rover. One of the goals of the LRO mission is to scout potential landing sites for future missions. It will also look for resources and characterize the lunar environment. The orbiter has six other aptly named instruments:
“Accomplishing these significant milestones moves us closer to our goals of preparing for safe human return to the moon, mapping the moon in unprecedented detail, and searching for resources,” said LRO Project Scientist Richard Vondrak in a press release. The LRO will get as close as 19 miles above the surface, but will spend most of its mission 31 miles up. These pictures were taken to calibrate the cameras.
Images: NASA/Goddard Space Flight Center/Arizona State University
Source: Wired: Wired Science | 2 Jul 2009 | 6:22 pm Foot-in-Mouth: Why We Do ItThe very act of trying to avoid a faux-pas can cause it to happen.Source: Livescience.com | 2 Jul 2009 | 6:06 pm Why You Can’t Keep Your Foot Out of Your Mouth
It’s one of the more frustrating aspects of human nature: The harder we try not to say or do or think something, the more likely we are to slip — and often at the worst possible time. But maybe science can help. More than a decade after the inability of a Dostoevsky protagonist to stop thinking about a white bear inspired his first experiments, Harvard University psychologist Daniel Wegner has become one of the world’s foremost experts on what are now known as ironic processes. Using ingenious experiments to reveal the brain’s hidden machinations, Wegner and others have found that our brains expend steady, conscious effort to avoid talking about ex-girlfriends on first dates, sending putts off the green, or letting slip the real reason you were late for work. But when our conscious minds are stressed and preoccupied — by, for example, a desire not to screw up — a subconscious process devoted to guarding against the mistake slips through. Unwanted thoughts pop into the forefront of your mind. “Even though your conscious mind is trying to do the right thing, the unconscious mind is looking for the worst. It’s trying to protect you, but it’s actually more resistant to distraction than the conscious mind,” said Wegner. A bit of distraction “will unveil the process that’s looking for the worst that could happen.” Wired.com spoke to Wegner about his research and whether it might be possible to avoid these dreaded faux pas. Wired.com: Does this happen to everyone? Dan Wegner: It seems to be a pretty widespread phenomenon, but it occurs under very unusual conditions. Most of the time, when we want to think something or do something or behave in a certain way, it works. But when we’re really striving for something, when we’re under extreme stress or high mental load, that’s when we tend to get these ironic effects. The simplest example I have is if you hold a weight on a string — a necklace, something like that — and keep your eye on it, it’ll just move a little bit. But if you try hard not to move it in a certain direction, it’ll pretty regularly start moving in that direction. Just a little bit, but enough to measure the part of you that’s energized by the very desire not to do something.
Wired.com: What are some of the tests you’ve used to study these processes? Wegner: One of the things we did at first was ask people to give their stream of consciousness into a tape recorder while trying not to think of something. They’d mention it repeatedly. That’s not very great evidence, because it’s self-reported, so we asked people to try not to think about something that makes them aroused, and increased their skin conductance level in a measurable way. If you ask people to try not to think about sex, they tend to have it come back to mind repeatedly, and become aroused. Another way to get at this is the Stroop color-word task. I ask you to try not to think about something, then show you words on a computer screen and ask you to name the colors they’re printed in. If you’re trying not to think about something, and that word appears on the screen, your color naming is slower. Apparently the idea of what’s on the screen pops to mind so quickly that it interferes with naming. Wired.com: How do you extrapolate conscious and unconscious mechanisms from this? Wegner: The main tool we have is the use of these mental loads. If something happens when a person is under mental load, then we tend to attribute it to an unconscious process. A lot of our research is asking people to do a task that requires mental control, but at the same time as they’re remembering a six-digit number or monitoring something on TV. There are also studies where we’ve given people alcohol, and found that it undermines the ability of the mind to control itself. Wired.com: Do you know specifically what’s happening in the brain? Wegner: There are several studies of this. You find that one part of the brain is indeed associated with the conscious search for the right thing to do. Another part of the brain is watching for the ironic, wrong thing to do. Depending on what stage it is in the sequence of a person trying not to think about something, you can see these two different areas becoming activated. Wired.com: But do you know what those areas are doing? Wegner: Right now, all we know is that they’re activated while these thoughts are in mind. We don’t really know about the causal sequence. That’s one of the big problems with brain imaging in general — knowing whether we’re seeing a vehicle moving at high speed, or looking at the speedometer. But it’s an interesting direction for this research to go. One of the things I’m most interested in is knowing how we can overcome these problems. I think they underlie a lot of difficulties we have with daily life. When a person wants to avoid nervousness, when someone wants to get in a good mood or say the right thing at a party, we’d love to have control over our minds. What we’d like is a system that would allow us to do this on a regular basis. Our theory suggests a simple solution. Whenever you’re trying to control your mind, it’s a good idea to have lots of spare mental capacity. Trying to do this when you’re under stress, have a lot of work, or something is taking your mind off-task, is going to reduce the effectiveness of your conscious mind in exerting control. Wired.com: It doesn’t seem practical to say, “Don’t try to think about not spilling wine on the carpet in a stressful situation,” when being at the party in the first place is stressful. Wegner: Sometimes you’re stuck. The great leveler is making these processes automatic. In sports, people do things over and over until the action is automatic. It becomes so automatic that you don’t have the same mental process to engage. The whole thing has become unconscious. That only comes with practice. The person who wants to avoid saying awkward things on the first date — well, by the 30th date, they’re not doing it anymore. They have to just brave it. In sports we know this, but we don’t think of social life the same way. Wired.com: Have you found anyone who’s freakishly able to avoid these errors? Wegner: People who are very susceptible to hypnosis, and are hypnotized into having mental control, are virtuosos on these tests. Wired.com: Why shouldn’t we just have ourselves hypnotized into not slipping up? Wegner: Just a small percentage of the population is so susceptible to hypnosis that it might be useful, and this is largely untested. We’re talking about just a couple of experiments. Nobody’s looking at it as a practical matter, and much of the research on this is just beginning. Wired.com: What’s next in your own research? Wegner: These effects tend to be real problems for people who are trying to overcome prejudices. Suppose you’re trying to be color-blind, and not notice someone’s racial or ethnic group while hiring for a job. Can you do that? One of the new frontiers for study in this area is figuring out how we can control our social prejudices. Wired.com: Wouldn’t it be better to give up trying to control one’s prejudices, because that extra effort just pushes them closer to the surface? Wegner: I’m not sure giving up control is the answer. It may be that realizing you’re going to have problems with control is good. We can be more fair if we take as a given that we’re probably going to be prejudiced, and arrange our lives in ways that help overcome this. See Also:
Citation: “How to Think, Say, or Do Precisely the Worst Thing for Any Occasion.” By Daniel Wegner. Science, Vol. 324 Issue 5936, July 2, 2009. Image: Brymo/Flickr Brandon Keim’s Twitter stream and reportorial outtakes; Wired Science on Twitter.
Source: Wired: Wired Science | 2 Jul 2009 | 6:00 pm Scientists solve mystery of Scotland's shrinking sheepShorter, milder winters caused by global warming to blame for steady decrease in size of St Kilda sheep, experts say The mysterious shrinking sheep of St Kilda sounds like a job for super-sleuth Sherlock Holmes. The case involves a rare herd of wild sheep on the remote Scottish island - known in Scottish Gaelic as Hirta - that are refusing to bow to conventional evolutionary pressure, which says big is best. Instead, they have steadily decreased in size since the 1980s. Scientists have now stepped in to solve the conundrum, and fingered the culprit as the new Moriarty of mankind: global warming. The experts say shorter and milder winters mean that lambs do not need to put as much weight on during their first few months of life. Smaller animals that would have perished in harsh winters a few decades ago can now survive to their first birthday. As a result, the average weight of the sheep has dropped by 81g each year. The difference is too small to see with the naked eye, but it is important because it shows how animal populations can respond to climate change. Tim Coulson, a biologist at Imperial College London who worked on the study, said: "If animals can respond [to climate change] and can respond fairly rapidly, then evolution could play a role in helping them to adapt." The results appear in the journal Science. Biologists have reported that several species of birds and fish are changing size and shape, which could be down to global warming. Coulson said it was difficult to say what the response of the St Kilda sheep could mean for other species. Their island home, St Kilda, is just "vegetation and sheep" he said. In other cases, predators and competition for food from other animals complicate the picture and make it difficult to tease out the influence of changing climate. The study looked at a herd of wild Soay sheep on Hirta that biologists have studied since 1985. Dogs are forbidden on the island, so the scientists acted as human sheepdogs to herd the animals, which are expert jumpers, towards areas where they could be weighed. "These aren't fluffy white sheep, these are small and brown and wild animals," Coulson said. guardian.co.uk © Guardian News & Media Limited 2009 | Use of this content is subject to our Terms & Conditions | More Feeds
Source: Science news, comment and analysis | guardian.co.uk | 2 Jul 2009 | 6:00 pm Tiny New Battery Is PrintableA new battery, small and thin, weighs almost nothing and can be printed in a process similar to silk-screening shirts.Source: Livescience.com | 2 Jul 2009 | 5:00 pm Air France jet 'broke on impact'French investigators believe the Air France plane that crashed in the Atlantic broke up on contact with water, not in mid-air.Source: BBC News | Science & Environment | UK Edition | 2 Jul 2009 | 4:30 pm Polymer Scientist Says Creativity is KeyRyan Hayward studies nanomaterials and how they self-assemble.Source: Livescience.com | 2 Jul 2009 | 4:14 pm Vegans Have Lower Bone DensityVegans have 5 percent lower bone mass density than non-vegans, research finds.Source: Discovery News Top Stories : Discovery Channel | 2 Jul 2009 | 4:14 pm Vatican should learn from Galileo mess, prelate saysVATICAN CITY (Reuters) - The Catholic Church should not fear scientific progress and possibly repeat the mistake it made when it condemned astronomer Galileo in the 17th century, a Vatican official said on Thursday in a rare self-criticism.Source: Reuters: Science News | 2 Jul 2009 | 4:11 pm The Truth Behind Secret Recipes in Coke, KFC, Etc.The commercial appeal of a good mystery (real or manufactured) has not been lost on advertisers.Source: Livescience.com | 2 Jul 2009 | 3:48 pm Boat-'Bots for Brainiacs: LEGO Subs Launch Young EngineersRobots designed, built and run by Middle School and High School students compete underwater. Event hosted by the Stevens Institute of Technology, well known for its ocean-engineering programs.Source: Livescience.com | 2 Jul 2009 | 3:45 pm World 'still losing biodiversity'Species around the world are still being lost despite governments pledging action to reverse the trend, a report warns.Source: BBC News | Science & Environment | UK Edition | 2 Jul 2009 | 3:38 pm How to Keep Pets Safe During Fireworks4th of July fireworks can frighten pets. Here's what you can do.Source: Livescience.com | 2 Jul 2009 | 3:37 pm Mystery of Salamander Limb Regrowth SolvedScientists have uncovered how salamanders are able to regenerate their limbs.Source: Discovery News Top Stories : Discovery Channel | 2 Jul 2009 | 3:20 pm BLOG: Return to the Moon? Yea or Nay?Should NASA return to the moon or aim straight for Mars? Vote here.Source: Discovery News Top Stories : Discovery Channel | 2 Jul 2009 | 3:05 pm Solved: Why Blind Faults Make Big QuakesWhy do blind faults shake harder when they break? Scientists find the answer.Source: Discovery News Top Stories : Discovery Channel | 2 Jul 2009 | 2:45 pm How Earth Got its OxygenThe rise of oxygen on early Earth may have been caused by a microbial changing of the guard between methane-producers and oxygen-producers.Source: Livescience.com | 2 Jul 2009 | 1:15 pm Inflatable Tower Promises Easy Access to SpaceA nine-mile-high inflatable tower could offer cheap access to outer space.Source: Discovery News Top Stories : Discovery Channel | 2 Jul 2009 | 12:55 pm The time is nowBuilding for a wet but secure future in BangladeshSource: BBC News | Science & Environment | UK Edition | 2 Jul 2009 | 12:09 pm Eco-Friendly Fireworks Offer Safer Pyrotechnics"Green" fireworks produce less smoke and use fewer toxic metals than other pyrotechnics.Source: Discovery News Top Stories : Discovery Channel | 2 Jul 2009 | 12:05 pm
|
After a female penguin lays one or two eggs, she leaves the nest to forage for food while dad guards the eggs. Once the chicks hatch, mom and dad share equal responsibility for baby-rearing, with one parent enduring long periods of fasting to care for chicks while the other parent hunts at sea.
