The annual Serengeti wildebeest migration is a journey so fraught with peril, it's a wonder they set off at all. For wildlife expert Jean du Plessis, it's a unique chance to see how a new generation of calves, born just months ago, will fare among the predatorial lions and crocodiles that await them.
Emus are unique: Native only to Australia, they're the second largest bird in the world and can trace their lineage back to the dinosaurs. When males incubate their eggs, they don't eat, drink, or even go to the bathroom until the job is done. Follow the fascinating life of this flightless bird as it stubbornly defies the odds by doing things its own way.
Adam Rutherford meets a new creature created by American scientists - the spider-goat. It is part goat, part spider, and its milk can be used to create artificial spider's web. It is part of a new field of research, synthetic biology, with a radical aim: to break down nature into spare parts so that we can rebuild it however we please.
There's an animal in Africa so physically unremarkable, we had to beg a guide to help us find it! But the topi is anything but ordinary. How about "freeloading finesse"? Small groups tag along with herds of migratory beasts, relying on their watchful eyes to guard against predators. But a "matchmaking party"?! In the rainy season, small groups of female topis steadily merge into a huge herd in their search for grass shoots. And the males are waiting … and battling for prime mating rights!