How do sea turtles know where to return to lay their eggs?
Quick Answer
Sea turtles use Earth’s magnetic field like a natural map and compass. They can remember the magnetic signature of their natal region and return years later to nest.
The Full Story
Sea turtles are famous for navigating thousands of kilometers across the ocean and returning to the beaches where they hatched. Scientists think they use Earth’s magnetic field to sense both direction and location, a skill called magnetoreception. This helps them follow ocean routes and recognize broad geographic areas. Female turtles typically return to land only to nest, and many species do so every 2 to 4 years. Loggerheads, green turtles, and hawksbills all show some form of this remarkable homing behavior.
Key Facts
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Suggested video title for this topic:
"The ocean’s original GPS: how turtles find home."