In 2021, scientists tested 20 bonnethead sharks and found they use Earth’s magnetic field to navigate, suggesting sharks may have a magnetic map |
Twenty bonnethead sharks were given an unusual test at a Florida State University laboratory in 2021: could they tell where they were by reading Earth’s magnetic field? The young sharks, caught in the Gulf of Mexico, were placed in a tank where scientists recreated the magnetic conditions of different locations hundreds of kilometres away. When…