In nature, living long enough to breed is a monumental struggle. Many animals and plants go to extremes to give themselves a chance. The miniature strawberry poison arrow frog carries a tadpole high into a tree and drops it in a water-filled bromeliad. The frog must climb back up every few days to feed it. While fledgling chinstrap penguins undertake a heroic and tragic journey through the broken ice to get out to sea. Many can barely swim and the formidable leopard seal lies in wait.