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Could an impending rise in solar storms cause more whales to strand?

Could an impending rise in solar storms cause more whales to strand?
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Kenneth lohmannJesse grangerUniversity of north carolinaDuke universityNorth carolinaLive science

EarthSky | True polar wander: A shift 84 million years ago

The fossil magnetism of rocks in Italy revealed true polar wander - a major shift in Earth s outer shell relative

Chapel hillUnited statesRice universityWikimedia commonsRichard gordonJoe kirschvinkSarah slotznickRoss mitchellKenneth lohmannInstitute of geologyNature communicationsDartmouth collegeUniversity of north carolinaTokyo institute of technologyTokyo instituteLate cretaceous

Sharks Use the Earth s Magnetic Field Like a Compass

To revist this article, visit My Profile, then View saved stories. Every year, great white sharks travel over 12,000 miles from South Africa to Australia, charting a nearly perfect straight line across the ocean. And every year, they turn around and travel back. There are no street signs to guide them and, for much of the journey, no stable landmarks by which they can set their course. Currents and water temperatures change. The sun sets at night, the stars disappear during the day. But the sharks carry on. For decades, scientists have speculated that sharks must be using the Earthâs magnetic field as a sort of atlas, but it was hard to prove because sharks are notoriously difficult to study. Itâs not easy to keep them in captivity, and some species are largeâa great white, for example, stretches up to 20 feet long and can weigh in at over 2,000 pounds. Itâs tricky to design an experiment big enough to test them in a controlled laboratory setting. Now, in a stu

United statesKyle newtonKenneth lohmannUniversity of washingtonUniversity of north carolinaNorth carolinaSaint louisஒன்றுபட்டது மாநிலங்களில்கைல் நியூட்டன்கெநெத் லோஹ்மன்பல்கலைக்கழகம் ஆஃப் வாஷிங்டன்பல்கலைக்கழகம் ஆஃப் வடக்கு கரோலினாவடக்கு கரோலினாதுறவி லூயிஸ்

Sharks use the Earth s Magnetic Field as a Compass

Sharks use the Earth’s Magnetic Field as a Compass “It’s a very interesting and clear drawing that sharks use the Earth’s magnetic field as a map,” says Kenneth Lohmann, a biology professor at the University of North Carolina who didn’t participate in the research. Lohmann has documented similar abilities in salmon and sea turtles. This research suggests that the ability to navigate using magnetic detection may be widespread among marine animals that migrate during the season. “Lohmann says it’s the equivalent of asking a young child to learn a home address.” When small, sharks learn the magnetic “address” of the original estuary or bay. This information helps them to return later, even after thousands of miles. (They may not respond to magnetic information in Tennessee, presumably because it is outside the realm they know.)

United statesKyle newtonKenneth lohmannUniversity of washingtonUniversity of north carolinaNorth carolinaஒன்றுபட்டது மாநிலங்களில்கைல் நியூட்டன்கெநெத் லோஹ்மன்பல்கலைக்கழகம் ஆஃப் வாஷிங்டன்பல்கலைக்கழகம் ஆஃப் வடக்கு கரோலினாவடக்கு கரோலினா

Sharks can navigate via Earth s magnetic field, study confirms for the first time

Sharks can navigate via Earth s magnetic field, study confirms for the first time Scientists have long suspected the fish can travel by sensing the magnetic field, but no one knew how until now. ByTim Vernimmen Email When it comes to remarkable feats of migration, you’ll often hear about birds or salmon. But many sharks also undertake impressive journeys across the oceans, from great white sharks some of which travel from South Africa to Australia and back to lemon sharks that can find their way home to a tiny island in the Bahamas. For decades, scientists have wondered how these fishes pull this off. Many species have a superior sense of smell, but although it may help them to orient during the final stretch, it’s unlikely that smell alone could guide them across large distances. That’s why many experts believe sharks navigate by sensing Earth’s magnetic field, perhaps using the same electromagnetic sensory organs that help them track down prey.

United statesFlorida state universityHenrik mouritsenBryan kellerKenneth lohmannAtmospheric administrationNational oceanicUniversity of north carolina at chapel hillUniversity of oldenburgSouth africaFlorida stateCurrent biologyGulf coastNorth carolinaChapel hillஒன்றுபட்டது மாநிலங்களில்