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BBC viewers were scared stiff last night by dramatic footage in the long-awaited series Planet Earth 2 that showed dozens of snakes chasing baby iguanas. The astonishing television which showed marine iguanas attempting to outrun a knot of racer snakes on Fernandina Island was labelled ‘the stuff of nightmares’. Hatchlings could be seen emerging from the sand of the Galápagos island in the Pacific Ocean in June for what is the snakes’ best feeding opportunity of the year.