Science 49 results

Giant Squid Killed by Sound?

Workers recover the remains of a female giant squid in Spain's Asturias province in 2003. Photograph by Fernando Camino, Cover/Getty Images

"We now have proof" sonar blasts can harm squid, expert says. Ker Than for National Geographic News Published May 3, 2011 When giant squid were found dead off Spain about a decade ago, scientists suspected that powerful sound pulses from ships had harmed the animals. Now the evidence may be in. A new study says low-frequency sounds from human activities can affect squid and other cephalopods, not just whales and other marine mammals, which have long been thought to be vulnerable to such pulses. The finding suggests noise pollution in the ocean is having a much broader effect on marine life than previously thought, said study leader Michel André, a marine bioacoustician at Barcelona's Technical University of Catalonia. "We know that noise pollution in the oceans has a significant impact on dolphins and whales [which use natural sonar to navigate and hunt]. ... but this is the first study indicating a severe impact on invertebrates, an extended group of marine species that are not known to rely on sound for living," André said in a statement. ...

Still Searching: SETI Pioneer Jill Tarter Talks Shutdown, Aliens

For many alien enthusiasts, Jill Tarter is synonymous with the search for extraterrestrial intelligence. As the SETI Institute’s research director — and the inspiration for Jodie Foster’s character in Contact — she’s done more than anyone to raise the search for cosmic company from a fringe effort to serious science. After receiving a TED prize in 2009, Tarter had grand plans for the Allen Telescope Array, a proposed field of 350 big-nosed radio dishes that would be the world’s only dedicated SETI telescope, as well as its most sensitive. But this week, budget cuts forced the ATA’s existing 42 dishes into hibernation mode. The rest are now just a dream. Wired.com talked with Jill Tarter about the shutdown and what it means for the future of SETI....

The Search for the Elusive Hangover Cure

alc For as long as people have been drinking alcohol, they've been trying to figure out a way to avoid its woozy, nauseated, sensory-amplified aftermath. But is there really any foolproof strategy for preventing a hangover besides, say, not drinking? Scientifically speaking, no. There is no such thing as a hangover cure. In a review of 15 clinical trials of hangover-intervention methods, a team of researchers publishing in the British Medical Journal found that not a single one worked. They concluded:...

BPA Linked to Childhood Asthma

bpa Endocrine disruption, diabetes, obesity—to the list of ills potentially associated with exposure to the chemical bisphenol-A (BPA), you can add one more: childhood asthma. In a new study presented over the weekend at the Pediatric Academic Societies (PAS) annual meeting in Denver, researchers from the Penn State College of Medicine found that if pregnant women are exposed to BPA, their children may end up at a higher risk for developing asthma early in life. ...

Despite Bipartisan Support, Nuclear Reactor Projects Falter

npp WASHINGTON — In an effort to encourage nuclear power, Congress voted in 2005 to authorize $17.5 billion in loan guarantees for new reactors. Now, six years later, with the industry stalled by poor market conditions and the Fukushima disaster, nearly half of the fund remains unclaimed. And yet Congress, at the request of the Obama administration, is preparing to add $36 billion in nuclear loan guarantees to next year’s budget. Even supporters of the technology doubt that new projects will surface any time soon to replace those that have been all but abandoned. “My gut feeling is that there is going to be a delay,” said Neil Wilmshurst, a vice president of the Electric Power Research Institute, a nonprofit utility consortium based in Palo Alto, Calif. News on Thursday that Exelon Corporation, the nation’s largest reactor operator, planned to buy a rival, the Constellation Energy Group, only reinforces the trend; until late last year, Constellation wanted to build, while Exelon was firmly against it. ...

T. Rex Had A Cousin In China!

TREXCOUSIN Researchers have found and named a new dinosaur species closely related to the massive theropod Tyrannosaurus rex. The newly discovered creature, dubbed Zhuchengtyrannus magnus and believed to be one of the largest known carnivorous dinosaurs, was identified based on skull and jaw bones unearthed from an eastern Chinese quarry. A long-lost cousin of prehistory’s most infamous predator, Tyrannosaurus rex, has been found and identified, according to a paper published online on April 1, 2011, in the scientific journal Cretaceous Research. The gargantuan theropod has been dubbed...

A Sad Day For Germany – RIP KNUT

Awww, so sad. Just heard the news:

Berlin's beloved polar bear Knut, who rose to international stardom as a cuddly cub hand-raised by zookeepers, died suddenly on Saturday, a zoo official said.

The world-famous bear died alone in his compound without warning, bear keeper Heiner Kloes told The Associated Press.

"It was a completely normal day: He was with the female bears before, who had just been shut away," Kloes said. "Then, Knut strolled around the enclosure, went into the water, had a short spasm and died." A post mortem will be conducted on Monday to try to pinpoint the cause of death, he said.

Between 600 and 700 people were at Knut's compound and saw the four-year-old bear die, German news agency DAPD reported.

One visitor said she watched Knut lying on the surface of the water motionless with only his back showing for ten minutes until zookeepers came and fenced off the compound. "Everybody was asking, 'What's going on, why is Knut not moving?'" said Camilla Verde, a 30-year-old Italian who lives in Berlin.

...

Nuclear Weapons and Climate Change: Part Two

ozone On Feb. 25, I posted a blog arguing that nuclear weapons are the most important and urgent environmental threat today—even more important than climate change caused by greenhouse gasses. I received quite a bit of feedback from environmentalists—many of whom took umbrage with my thesis. Interestingly, no one argued that the predictions of climate change following a limited nuclear war (50-100 Hiroshima-sized bombs) was unsound—after all, scientists use some of the same climate modeling techniques to predict the global cooling from nuclear fallout and soot as they use to chart the future of global warming from carbon emissions and other greenhouse gases. Many environmentalists felt simply that the chances of nuclear war were so small that worrying about its effect on the climate was a waste of time. Joe Romm's sentiments on the Climate Progress blog were typical: "So the scenario being offered is that some accident or other event leads to India and Pakistan suicidally using most of their nuclear weapons on each other. Something to worry about? Absolutely. Likely? Not terribly. Preventable through the political efforts of U.S. environmentalists? Gimme a break!"...

Why Nukes are the Most Urgent Environmental Threat Part I

abomb Environmentalists: Wake up! There is a greater and more urgent threat to the climate than even global warming: the threat posed by nuclear weapons. Why are nuclear bombs an environmental problem? We have long known that a large-scale nuclear war would lead to a sudden change in climate—called a nuclear winter—that could threaten all life on earth. But in the past decade, climate scientists have used advanced climate modeling to show that even a small exchange of nuclear weapons—between 50-100 Hiroshima-sized bombs, which India and Pakistan already have their in arsenal—would produce enough soot and smoke to block out sunlight, cool the planet, and produce climate change unprecedented in recorded human history. Scary? It gets worse. New research by the National Center for Atmospheric Research (NCAR) suggests that the above scenario of a "limited" nuclear war would also burn a hole through the ozone layer, allowing extreme levels of ultraviolet radiation to reach the Earth's surface, which would greatly damage agriculture and most likely lead to a global nuclear famine....
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