讲述自然界中的动物母性，母亲如何在艰难的环境中将自己的孩子抚养长大。 　　Natural World investigates the vital bond between animal mothers and their babies. The more we study animals, the more we realise just how emotional they are; all mothers are faced with tough choices as they struggle to bring up babies in a difficult and dangerous world, constantly balancing their own needs with those of their infants. Yet the...