Sea animals navigate with magnetic maps

Scientists may have solved one of the most intriguing puzzles in marine biology - how sea creatures navigate across thousands of miles of ocean with pinpoint accuracy. They have found evidence that sea turtles and salmon can read the “magnetic map” of their native area and imprint it into their memories. They do this by reading and remembering variations in the earth's magnetic field.

In some ocenaic regions rocks rich in magnetic minerals produce local magnetic anomalies, according to scientists. These have often been viewed as potential problems for magnetically sensitive species but an interesting possibility is that anomalies might also serve as useful markers.

You can read more about this disovery here.