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A Vital Information, When Better Understood, Could Help Restore Sea Turtles, Some Birds, And Fishes To Where They Were Born. Scientists Have Observed That The Sea Turtles Learned Their Habitat’s Unique Magnetic Signature, And Use The Earth’s Magnetic Field To Find Their Way Back To Nest On Beaches 40-50 Miles Of Where They Were Born.

Sea Turtles Use Magnetic Fields to Find Their Birthplace Beach – The New York Times

https://www.nytimes.com/2018/04/13/science/sea-turtles-magnetic-field.html

Using loggerhead genetics, researchers traced the routes of turtles that return decades after birth to nest near their original homes.