Monday, April 25, 2016

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Wind energy converter inspired by ancient boats

By Amy Pollock and Mohamed Haddad A bladeless wind energy convertor inspired by the sailing boats of Ancient Carthage is set to breeze past traditional turbines in terms of efficiency, according to its Tunisian developers. A Tunisian start-up has taken inspiration from the sailing boats of Ancient Carthage to develop a bladeless, non-rotating wind energy convertor that is more efficient than traditional turbines as well as safer and quieter, according to the developers. Tunis-based Saphon Energy says the aerodynamic bowl-shaped sail on its turbine is capable of capturing twice as much wind energy over the same swept area as a conventional turbine.

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Astronaut runs marathon in space -- but slower than on earth

(Reuters) - British astronaut Tim Peake became the first man to complete a marathon in space on Sunday, running the classic 26.2 mile distance while strapped to a treadmill aboard the International Space Station. As part of the London Marathon, Britain's biggest mass participation race, the 44-year-old spaceman saw London's roads under his feet in real time on an iPad as, 250 miles below him, more than 37,000 runners simultaneously pounded the streets. Peake covered the distance in three hours 35 minutes 21 seconds, which was a world away from the time recorded by the real race winner, Kenya's Eliud Kipchoge, whose 2:03:05 was the second fastest ever recorded.


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Spectacular Auroras Captured in Dramatic New Time-Lapse Video

The shimmering atmospheric lighting displays known as auroras have never looked sharper than in a new ultra-high-definition video that was shot in space. The stunning time-lapse footage was captured from the International Space Station in 4K ultra high definition (UHD), a video format with a resolution of 3,840 pixels horizontal by 2,160 pixels vertical. As the space station passes overhead, the auroras' colorful, translucent light displays — mostly shades of brilliant greens with some purple and yellow hues — hover above Earth.


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Oldest Viking Crucifix Uncovered in Denmark

A solid-gold cross depicting Jesus with his arms outstretched may be Denmark's oldest crucifix, dating back more than 1,100 years. The gorgeous pendant was unearthed in March by a hobbyist with a metal detector. Found in a field on the island of Funen, Denmark, the Viking jewelry piece may have been worn by a Viking woman, according to the Viking Museum at Ladby, where the pendant was on display.


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Lap Dinos? Gigantic Sauropods Started Out Chihuahua-Size

Now, the discovery of the animal's fossilized bones suggests that the family of ginormous dinosaurs that this titanosaur belonged to started out small — each about the size of a Chihuahua — and were precocial, a new study finds. "Baby Rapetosaurus gives us our first in-depth look at a sauropod within just a few weeks of hatching," said study lead researcher Kristina Curry Rogers, an associate professor of biology and geology at Macalester College in Minnesota. "That's where I found them several years ago, when I was searching for bones of ancient crocodiles and turtles," Curry Rogers told Live Science in an email.


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How Jet-Black Metal Converts Sunlight to Steam Power

Steam power, once a major force behind the Industrial Revolution, could be coming back into fashion, after Chinese researchers designed the world's "darkest metal" that converts sunlight to steam at roughly 90 percent efficiency. Despite being made from gold, the so-called "plasmonic absorber" is jet black as it absorbs 99 percent of light in the visible to mid-infrared spectrum. Its designers say this is a dramatic improvement over previous metal absorbers and comparable to the world's darkest material, carbon-nanotube (CNT) arrays.

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Levitating Sled Sets New World Speed Record

A new magnetic levitating (maglev) sled has blasted its way to a world speed record. The lightning-fast sled is officially the fastest object of its kind, according to the U.S. Air Force. The 2,000-lb. (900 kilograms) sled, which was designed by an Air Force squadron to test the delicate instruments inside weapons systems, broke the world record for speed on March 4, eclipsing its own previous record that had been set just two days earlier.


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Bizarre Ant Life Rafts Have Assigned Seating

It's weird enough that some ant species can work together to build living rafts in the event of a flood. Fire ant species make similar rafts, clinging to one another with their jaws, claws and sticky leg pads.


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Drug Overdose Deaths Increased 70-Fold in These US Counties

Some U.S. counties have seen a 70-fold increase in drug overdose deaths in the last few decades, a new study finds. However, the areas with the highest increases in drug overdose deaths are not always the places with the most drug trafficking, as identified by the government, the study found. This suggests that drugs are passing through some high-trafficking counties without affecting death rates of the people in those regions, but are causing problems in other parts of the country, the researchers said.

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Woman's Paranoia Had an Unusual Cause

The 43-year-old woman in Turkey had become suddenly suspicious of her husband's infidelity, and had started looking through his phone and personal belongings, the doctors who treated her wrote in their report of her case, published in March in the journal BMJ Case Reports. The woman came to see doctors in January 2015, seeking medical help for her paranoia about her husband's behavior, said Dr. C. Onur Noyan, a psychiatrist at NPIstanbul Neuropsychiatry Hospital in Istanbul who treated the woman and was the lead author of the case report. The doctors conducted a detailed psychiatric evaluation and concluded that the woman had experienced a brief psychotic attack, Noyan said.

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Why Some 'Unhealthy' Eating Behaviors Might Not Be That Bad

Dining out or eating canned foods might not actually be so bad for your waistline, a new study from Spain suggests. People who said they ate while watching TV at least two times a week, or didn't plan how much to eat before they sat down to a meal, were more likely to gain weight, compared with people who didn't report engaging in these unhealthy eating behaviors. But many other behaviors that are typically thought of as unhealthy — including eating pre-cooked or canned foods, buying snacks from a vending machine, and eating at fast food restaurants more than once a week — were not linked to weight gain.

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