How do sea turtles find their way?

1. 1

   Wobble says

   A mother sea turtle crawls up a sandy beach at night and lays her eggs in the sand. About two months later, the babies hatch and scurry down to the sea. They grow up far out in the ocean. Many years later, the grown-up girl turtles swim back to lay their eggs near the beach where they hatched.

   For ages 4–7
   Hear Wobble

   Checked against Loggerhead turtle (NOAA Fisheries)

2. 2

   How does a turtle find that beach again?

   All around the Earth are invisible magnetic lines. Sea turtles can feel them. Each part of the coast has its own magnetic feel, and the turtles remember it, like a secret address. Years later, they follow it all the way home.

   For ages 6–9
   Hear Wobble

   Checked against How do sea turtles find the exact beach where they were born? (National Geographic)

3. 3

   How do we know they follow magnetic lines?

   Earth's magnetic lines slowly shift over the years. Scientists studying loggerhead turtles spotted something amazing. As the lines shifted along the coast, the turtles' nests shifted with them. The turtles were following the magnetic feel of home, even as it moved.

   For ages 8–11
   Hear Wobble

   Checked against How do sea turtles find the exact beach where they were born? (National Geographic)

In Lil' Phil, reaching the bottom of this wonder earns a sticker for Wobble's collection.

• 

  How do crabs grow?

  Ages 4–9Wobble
• 

  Why do dolphins click and whistle?

  Ages 4–11Wobble