ananyo writes "When U.S. presidential candidate Mitt Romney said last year that he was not even going to try to reach 47% of the US electorate, and that he would focus on the 5–10% thought to be floating voters, he was articulating a commonly held opinion: that most voters are locked in to their ideological party loyalty. But Lars Hall, a cognitive scientist at Lund University in Sweden, knew better. When Hall and his colleagues tested the rigidity of people's political attitudes and voting intentions during Sweden's 2010 general election, they discovered that loyalty was malleable: nearly half of all voters were open to changing their minds. Hall's group polled 162 voters during the final weeks of the election campaign, asking them which of two opposing political coalitions — conservative or social democrat/green — they intended to vote for. The researchers also asked voters to rate where they stood on 12 key political issues, including tax rates and nuclear power. The person conducting the experiment secretly filled in an identical survey with the reverse of the voter's answers, and used sleight-of-hand to exchange the answer sheets, placing the voter in the opposite political camp. The researcher invited the voter to give reasons for their manipulated opinions, then summarized their score to give a probable political affiliation and asked again who they intended to vote for. On the basis of the manipulated score, 10% of the subjects switched their voting intentions, from right to left wing or vice versa. Another 19% changed from firm support of their preferred coalition to undecided. A further 18% had been undecided before the survey, indicating that as many as 47% of the electorate were open to changing their minds, in sharp contrast to the 10% of voters identified as undecided in Swedish polls at the time (research paper). Hall has used a similar sleight of hand before to show that our moral compass can often be easily reversed."

coondoggie writes "There has been much chatter about the threat of an asteroid or significant meteor strike on Earth — mostly caused by the untracked meteor that blasted its way to international attention when it exploded in the sky above Russia injuring nearly 1,200 people in February. It was one of those amazing coincidences that on that same day an asteroid NASA had been tracking for months — asteroid 2012 DA14 — was to harmlessly cross Earth's path. Those events and the topic of mitigating asteroid and meteor or Near Earth Object threats to Earth prompted a couple congressional hearings by the Committee on Science, Space, and Technology, the latest of which was held this week. None of the NEOs found to date have more than a tiny chance of hitting Earth in the next century. Thus the near-term risk of an unwarned impact from large asteroids, and hence the majority of the risk from all NEOs, has been reduced by more than 90%. Assuming none are found to be an impact threat, discovering 90% of the 140 meter sized objects will further reduce the total risk to the 99% level. By finding these objects early enough and tracking their motions over the next 100 years, even those rare objects that might be found threatening could be deflected using existing technologies."

sciencehabit writes "Researchers have developed a camera system that shoots untouched flakes 'in the wild' as they fall from the sky. By grabbing a series of images of the tumbling crystals—its exposure time is one-40,000th of a second, compared with about one-200th in normal photography—the camera is revealing the true shape diversity of snowflakes. Besides providing beautiful real-time 3D snowflake photographs from a ski resort in Utah, the goal is to improve weather modeling. More accurate data on how fast snowflakes fall and how their shapes interacts with radar will improve predictions of when and where storms will dump snow and how much."

sciencehabit writes "Europe's best-known mummy wasn't just a medical mess; he also had terrible teeth, according to a new study. Ötzi, a Stone Age man who died atop a glacier about 5300 years ago, suffered from severe gum disease and cavities. When Ötzi was discovered atop a glacier on the Austro-Italian border, his frozen corpse was intensively studied. But no one took a close look at his teeth until now. Using 3D computer tomography (a CAT scan), the hunter's mouth could be examined for clues as to the life he led. A fall or other accident killed one of his front teeth, still discolored millennia later. And he may have had a small stone, gone unnoticed in his whole-grain bread or gruel, to thank for a broken molar. That gruel may be the culprit behind Ötzi's cavities and gum disease, too. The uptick in starches, the researchers suggest, could explain the increasing frequency of cavities in teeth from the time—a problem that's been with us ever since."

David Gallo is an oceanographer and Director of Special Projects at the Woods Hole Oceanographic Institution. He has participated in expeditions to all of the world’s oceans and was one of the first scientists to use a combination of robots and submarines to explore the deep seafloor. As a member of James Cameron’s Deep Ocean Task Force and the XPrize Ocean Advisory Board, David actively encourages the development of new technologies for ocean exploration. With more than 8 million views, his TED presentation entitled Underwater Astonishments is the 4th most viewed TED Talk to date. David has agreed to come up for air and answer any questions you may have. As usual, ask as many as you'd like, but please, one question per post.

mask.of.sanity writes "A Swedish engineer has sent his radio controlled airplane to the edge of space using a weather balloon. It reached 33,100 metres before the balloon popped. The trip is captured on film and he has detailed the project in a blog. Amazing stuff."

sciencehabit writes "Lufengosaurus, a long-necked, plant-eating dinosaur that lived in China during the Jurassic period, were the biggest animals of their age, measuring 30 feet long. Now, fossilized embryos reveal that they were also the fastest growing animals on record — 'faster than anything we have ever seen,' according to one researcher. What's more, researchers have found traces of organic matter in their bones, which may belong to the oldest fossil proteins ever found."