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Salmon appear to seek the magnetic signature of their home river during their spawning migration. 
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A proposed design for a cylindrical shell with unusual magnetic properties offers a way to concentrate magnetic field energy. Just as a light beam bends when it hits water, magnetic field lines become distorted when they penetrate an object with magnetic properties. Writing in Physical Review Letters, a team of theorists makes use of that elementary fact to propose a cylindrical device that could sculpt a magnetic field, concentrating its energy in a given region of space. The device could increase the sensitivity of a detector or transfer magnetic energy with increased efficiency from one place to another.
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Humans form beliefs asymmetrically; we tend to discount bad news but embrace good news. This reduced impact of unfavorable information on belief updating may have important societal implications, including the generation of financial market bubbles, ill preparedness in the face of natural disasters, and overly aggressive medical decisions. Here, we selectively improved people’s tendency to incorporate bad news into their beliefs by disrupting the function of the left (but not right) inferior frontal gyrus using transcranial magnetic stimulation, thereby eliminating the engrained “good news/bad news effect.”
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A team of researchers in South Korea has developed a method to cause cell death in both living fish and lab bowel cancer cells (in vivo and in vitro) using a magnetic field. The application of the magnetic field, as described in their paper published in the journal Nature Materials, triggers a "death signal" that leads to programmed cell death.
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We still have a lot to learn about how animals use magnetic fields. And how does magnetoreception even work? How animals navigate over long distances is still a great mystery, but scientists are on the case.
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From
phys
A favorite theme of science fiction is 'the portal' -- an extraordinary opening in space or time that connects travelers to distant realms. A good portal is a shortcut, a guide, a door into the unknown.
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In order to illustrate the earth's magnetic field, three datasets for Earth's Magnetism have been created. All of these datasets show the changes in the magnetic field from 1590 - 2010. The first dataset shows the magnetic field lines at the surface of the Earth. The magnetic poles are indicated by stars. The blue lines show where the magnetic field dips into the Earth and the red lines show where the magnetic field emerges from the Earth. Where the field lines are horizontal to the Earth, between the red and blue lines, is the magnetic equator shaded yellow.
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What if materials could defy gravity, so that we could leave them suspended in mid-air? ZeroN is a physical and digital interaction element that floats and moves in space by computer-controlled magnetic levitation. Articles about LEVITATION: http://www.scoop.it/t/science-news?tag=levitation
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Scientists at Baylor College of Medicine have discovered 53 neuron cells in the small bird's brain that may actually make up a biological "GPS system," each with its own characteristic response to the Earth's magnetic field. The combined data of each neuron's reaction to its north-south and up-down orientation gives the pigeon not only an accurate compass heading, but may also give it coordinates on a mental map.
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From
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Researchers from the Complutense University of Madrid (UCM, Spain) have mathematically shown that particles charged in a magnetic field can escape into infinity without ever stopping.
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Scientists have taken an important step forward in developing a new material using nano-sized magnets that could ultimately lead to new types of electronic devices, with greater capacity than is currently feasible, in a study published today in the journal Science.
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European researchers said Thursday they have created a device invisible to a static magnetic field that could have practical military and medical applications.
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Following the Big Bang, the universe consisted only of nonmagnetic elements and particles. Now, a new mechanism has been discovered for the magnetisation of the universe even before the emergence of the first stars.
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Scientists in New Zealand are studying the past behaviour of Earth's magnetic field using the stones that line Maori steam ovens.
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A new study has found that Vesta once had a molten, swirling mass of fluid inside the asteroid that generated a magnetic field.
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Our planet's magnetic field is in a constant state of change, say researchers who are beginning to understand how it behaves and why.
Every few years, scientist Larry Newitt of the Geological Survey of Canada goes hunting. He grabs his gloves, parka, a fancy compass, hops on a plane and flies out over the Canadian arctic. Not much stirs among the scattered islands and sea ice, but Newitt's prey is there--always moving, shifting, elusive. His quarry is Earth's north magnetic pole. Scientists have long known that the magnetic pole moves. James Ross located the pole for the first time in 1831 after an exhausting arctic journey during which his ship got stuck in the ice for four years. No one returned until the next century. In 1904, Roald Amundsen found the pole again and discovered that it had moved--at least 50 km since the days of Ross.
The pole kept going during the 20th century, north at an average speed of 10 km per year, lately accelerating "to 40 km per year," says Newitt. At this rate it will exit North America and reach Siberia in a few decades. Keeping track of the north magnetic pole is Newitt's job. "We usually go out and check its location once every few years," he says. "We'll have to make more trips now that it is moving so quickly." Earth's magnetic field is changing in other ways, too: Compass needles in Africa, for instance, are drifting about 1 degree per decade. And globally the magnetic field has weakened 10% since the 19th century. When this was mentioned by researchers at a recent meeting of the American Geophysical Union, many newspapers carried the story. A typical headline: "Is Earth's magnetic field collapsing?" Probably not. As remarkable as these changes sound, "they're mild compared to what Earth's magnetic field has done in the past," says University of California professor Gary Glatzmaier.
Sometimes the the whole magnetic field of Earth completely flips. The north and the south poles swap places. Such reversals, recorded in the magnetism of ancient rocks, are unpredictable. They come at irregular intervals averaging about 300,000 years; the last one was 780,000 years ago. Are we overdue for another? No one knows. Via Dr. Stefan Gruenwald, ABroaderView
Robert T. Preston's curator insight,
June 2, 2013 2:18 PM
The magnetic North Pole is ever on the move, and always has been. See where it's been, where it's headed, and get a glimpse into why.
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A proposed explanation for puzzling features on the Moon involving small-scale magnetic fields has now been verified with a scaled-down version in the lab.
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Recently a paper out of Baylor college of medicine has shown the neural correlates which underlie this magnetic sense. They actually recorded from individual neurons while manipulating the surrounding magnetic field.
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Reddit’s IAmA forums can be a regular source of BS, so when we came across this “Ask Me Anything” session in which a 24-year-old electrical engineer (and grad student) shares his experiences with having magnets implanted in his fingertips, we were skeptical. Then we read it, and it was kind of awesome.
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New research has showed that the individual neurons in the brains of common pigeons could relay crucial information about the Earth’s magnetic field, potentially providing these animals with an internal GPS.
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From
phys
Forget computer viruses - magnet-making bacteria could be used to build tomorrow’s computers with larger hard drives and speedier connections.
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About every 11 years the magnetic field on the sun reverses completely – the north magnetic pole switches to south, and vice versa. This flip coincides with the greatest solar activity seen on the sun in any given cycle, known...
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Imagine that you have a big box of sand in which you bury a tiny model of a footstool. A few seconds later, you reach into the box and pull out a full-size footstool: The sand has assembled itself into a large-scale replica of the model. That may sound like a scene from a Harry Potter novel, but it's the vision animating a research project at the Distributed Robotics Laboratory (DRL) at MIT's Computer Science and Artificial Intelligence Laboratory. Articles about robotics: http://www.scoop.it/t/science-news?tag=robotics
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Discover how magnetism helps homing pigeons fly and amusement park rides operate.
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