EEL GPS Juvenile European eels may use Earth’s magnetic field to help them cross the Atlantic Ocean to reach freshwater rivers in Europe, including these seen in the U.K.’s Bristol Channel.
Nick Upton/Alamy
EEL GPS Juvenile European eels may use Earth’s magnetic field to help them cross the Atlantic Ocean to reach freshwater rivers in Europe, including these seen in the U.K.’s Bristol Channel.
Nick Upton/Alamy