In the time of Vikings, ravens were known for their ability to find land. Captains would keep a cage of the birds on board their ship and release a raven when they thought land was near. If the raven circled above the ship or returned to the ship, they gave up on finding land soon. But if the bird flew in a direct path, the ship followed in hopes of spotting the shore.
How did early Sailors navigate the Oceans? | The Curious Engineer
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