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Terror for breakfast
You may recall the summer sci-fi movie The Core; it sported some of the most howlingly awful science of any film in history. Nevertheless, life is now imitating bad art — because apparently the Earth’s magnetic field has weakened by 10 per cent in the last 150 years. Scientists wonder if this is the beginning of an inversion of the North and South poles, an event that has taken place several times in the planet’s lifespan. As the New York Times reports:
The magnetic field last flipped 780,000 years ago, but the time between reversals has varied from a few thousand years to 35 million years.
At the current rate of decline, the field would disappear in 1,500 to 2,000 years. That is much faster than if the iron flows had somehow completely stopped, because then the electric currents generating the field would still persist for 15,000 additional years. This has led scientists to conclude that the changes in iron flow have produced kinks in the magnetic field that are weakening it.
“They’re twisting the field the wrong way,” said Dr. Peter L. Olson, a professor of earth and planetary sciences at Johns Hopkins University.
I'm Clive Thompson, a writer on science, technology, and culture. This blog collects bits of offbeat research I'm running into, and musings thereon.
Currently, I'm a contributing writer for the New York Times Magazine and a columnist for Wired magazine. I also write for Fast Company and Wired magazine's web site, among other places. Email or AOL IM me (pomeranian99) to say hi or send in something strange!
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» visit the Collision Detection archives
September 26, 2008 » 01:57 PM
From an interview with ethnobotanist and anthropologist Wade Davis:
One of the cultures you celebrate in Light at the Edge of the World is the Inuit. What do you most admire about them?
Davis: The Inuit didn’t fear the cold; they took advantage of it. During the 1950s the Canadian government forced the Inuit into settlements. A family from Arctic Bay told me this fantastic story of their grandfather who refused to go. The family, fearful for his life, took away all of his tools and all of his implements, thinking that would force him into the settlement. But instead, he just slipped out of an igloo on a cold Arctic night, pulled down his caribou and sealskin trousers, and defecated into his hand. As the feces began to freeze, he shaped it into the form of an implement. And when the blade started to take shape, he put a spray of saliva along the leading edge to sharpen it. That’s when what they call the “shit knife” took form. He used it to butcher a dog. Skinned the dog with it. Improvised a sled with the dog’s rib cage, and then, using the skin, he harnessed up an adjacent living dog. He put the shit knife in his belt and disappeared into the night.
September 25, 2008 » 11:21 AM
“Video from a camp north of Toronto in December 2005 shows a car spinning around in a nearby, snow-covered parking lot. Prosecutors characterized that as special driver training but the defense, and many outsiders, said it was nothing more than “cutting doughnuts,” a favorite winter pastime of young Canadian motorists.” - A key piece of evidence submitted in the trial of a gang of alleged young Canadian terrorists.
September 24, 2008 » 11:21 PM
“Life imitates art imitating life: just thought a gnat crawling across my monitor was part of a Flash-based ad. I clicked it.” - A Tweet from Bill Braine.
September 24, 2008 » 02:37 PM
“Funniest FB friend request ever: “Twitter friend hoping to get to second base (Facebook!) ;-).”” - A recent Tweet by Pistachio
September 24, 2008 » 12:28 PM
Chinese powdered-milk crisis creates a new market: The return of the wet nurse
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