WASHINGTON: Scientists have for the first time found a sensor to detect the Earth’s magnetic field in an animal after they discovered a tiny antenna-like structure in the brain of worms that acts like an internal compass to help them navigate.
Animals as diverse as migrating geese, sea turtles and wolves are known to navigate using the Earth’s magnetic field. But until now, no one has pinpointed how they do it.
Researchers at The University of Texas at Austin found the sensor in worms called C elegans, a microscopic structure at the end of a neuron that other animals probably share, given similarities in brain structure across species.
The sensor looks like a nano-scale TV antenna, and the worms use it to navigate underground.
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