Great question! Many animals have what are
called homing instincts. This is the
ability of an animal to find their home from very
far away. Some animals use landmarks that they
recognize like roads, mountains, rivers, and even
familiar smells to find home. Many animals
actually have a built-in GPS system in their
Magnetized cells in their brains use the
Earth's magnetic field to help them tell which way
is North. Other things, like the location of the
sun during the day and the stars at night can help
guide animals home. Animals that live in the ocean
even use familiar sounds to help them find home.
Most animals, including dogs, will usually use
several of these methods at once in order to find
As humans, we do not have magnetized cells
in our brains (or at least we haven't discovered
any yet), so we had to rely on other things like
landmarks and the position of the sun and stars to
figure out which way to go until some smart people
figured out that we could use magnets in a device
called a compass to tell us which way is North.
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