Each year, thousands of wildebeest drown while making their annual migration through the Serengeti. New research shows how the resulting 1100 tonnes of rotting flesh performs a crucial role in maintaining the region's vibrant ecosystem.
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Video: Marooned on a far-off but weirdly Earth-like planet, a pair of astronauts spend their days studying the very strange, surreal creatures that roam its surface. Their experiments may seem odd (and involve a lot of gooey slime), but there's a specific goal at the end that has everything to do with good ol' homesickness.