migration
decided route.
Those that migrate travel long distances in groups from one part of
the world to another, past oceans, over plains, or through the sky.
 | Heres a picture of a basking shark. |
Migration has captured the interest of humans for centuries. Ancient civilizations devised many myths to explain the periodic appearance and disappearance of vast numbers of animals. For instance, people once thought that tiny birds called swallows buried themselves in the mud at the bottom of lakes to get through the winter. Instead, scientists found out that swallows fly all the way from Europe to Africa and back in one year. Perhaps the truth was harder to believe than the myth.
