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In the final episode of the series, Davina travels to the Costa Rican jungle, one of the wettest places on earth, a habitat in which animals thrive. Even with near 100 per cent humidity, and being less than a quarter of the size of the UK, it's home to a staggering 500,000 species of life.

Episode Title: Costa Rica - Wet
Airs: 2016-03-21 at 21:00