The spectacle of millions of wildebeest making their semi-annual trek, trailed by predators looking for an easy meal, through East Africa's Serengeti and Maasai Mara wildlife reserves is familiar to anyone who's seen more than a handful of nature programs. As Great Migrations shows, though, countless other animals, from monarch butterflies and sandhill cranes to ocean-going sea turtles and Arctic caribou, undertake epic journeys of their own, over awe- inspiring distances, through climate extremes and suffering innumerable hardships along the way, just in order to survive.
Despite climate change, human development and environmental degradation, animal migrations seem unstoppable - as if there's a sense of larger purpose at work. Over the course of their study, National Geographic researchers found that animal migration is more complex and grander than the mere mass movement of animals. Animal migration is about the idea of collective travel with long- deferred reward. It suggests forethought and a wilful strength of mind, wired in at birth as inherited instinct.
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