Natural phenomena occur all over the world but few can compete with the annual Masai Mara/Serengeti wildebeest migration. The numbers alone are hard to believe: up to two million animals - wildebeest as well as zebra and gazelles - move clockwise around this enormous ecosystem, driven by ancient instincts to find fresh grazing and water.

It's drama on a truly epic scale: the migrating herds undergo all manner of challenges and hardships as they m...

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