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Spiders on the Move in Flood-Ravaged Australia

WAGGA WAGGA, Australia (Reuters) - Thousands of spiders have cast eerie webs over vast areas of flood-hit Australia after being forced to seek shelter by the rising waters.

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Why It Took So Long to Invent the Wheel

Wheels are the archetype of a primitive, caveman-level technology. But in fact, they're so ingenious that it took until 3500 B.C. for someone to invent them

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Accidentally ‘Introduced’ Species Threaten Antarctic Ecosystem

By Pauline Askin SYDNEY (REUTERS) - In the pristine frozen continent of Antarctica scientists fear an alien invasion -- not from outer space, but carried in people's pockets and bags. Seeds and plants accidentally brought to Antarctica by tourists and scientists may introduce alien plant species which could threaten the survival of native plants in the finely balanced ecosystem. Invasive alien plants are amongst the most significant conservation threat to Antarctica, especially as climate change warms the ice continent, said a report in the Proceedings of the National Academy of Sciences Journal published on Tuesday.

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Raise It or Raze It?: How Will the Stranded Italian Cruise Ship Be Salvaged?

At more than twice the size of the Titanic, the Costa Concordia was the largest passenger vessel ever to sink when it capsized off Italy's northwest coast on January 13. So far, Italian authorities say of the more than 4,200 passengers and crew on board, at least 18 are confirmed dead and 14 unaccounted for , and the insurance costs may reach $1 billion, according to Moody's Investors Service.

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Dark Matter Clump Furrows Brows

Dark matter. It’s hard to see, it’s hard to study and it just won’t behave. There’s plenty dark matter around

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Psoriasis Linked To Protection From HIV-1

Psoriasis is an autoimmune disease--the immune system mistakenly attacks its own body, causing red, itchy, scaly patches on the skin. But there may be a hidden upside.

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Knee Replacements On Shaky Scientific Ground

Knee replacement image courtesy of iStockphoto/33karen33 As the U.S. population ages and continues packing on the pounds, knee replacement surgeries are becoming increasingly common

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Scientists See Rise in Tornado-Creating Conditions

By Sharon Begley NEW YORK (Reuters) - When at least 80 tornadoes rampaged across the United States, from the Midwest to the Gulf of Mexico, last Friday, it was more than is typically observed during the entire month of March, tracking firm AccuWeather.com reported on Monday. According to some climate scientists, such earlier-than-normal outbreaks of tornadoes, which typically peak in the spring, will become the norm as the planet warms

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