How do animals find their way home?

You're walking home from school and you know every turn without thinking — left at the big oak tree, right at the blue mailbox, straight past the corner store. Easy. But what about a sea turtle crossing an entire ocean, or a bird flying thousands of miles through storms and darkness? How do animals find their way home when there are no street signs, no maps, and no one to ask for directions?
Some animals use the sun like a compass. Bees, for instance, watch where the sun sits in the sky and calculate angles — if the sun is here at this time of day, then home must be that direction. It's like using shadows on a sundial to tell time, except they're using the sun's position to tell direction. Even on cloudy days, bees can detect the sun's location through the clouds using special light patterns we can't see.
