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Joy and Mark visit Africa to investigate the unique reproduction challenges of the largest animal on land: the elephant.
Joy and Mark visit Australia to uncover the reproductive secrets of some of the strangest mammals on Earth: the pouch-wearing marsupials.
In Borneo, Joy and Mark explore the reproduction challenges of one of our closest cousins, the orang-utan.
Joy and Mark investigate the reproductive secrets of marine mammals. How do animals that breathe air manage to mate, give birth and raise their young underwater?
