The show takes a spooky turn as we go on a ghost hunt through the natural world. Sebastian shares his adventures finding fossils – the traces of animals that once lived, and Rutendo talks about her experiences in The Cradle of Humankind, the South African UNESCO World Heritage site containing early human fossils. Deep in the Peruvian Amazon there is a species of wild dog so rarely sighted it has become known as the ‘ghost dog’. We hear from Renata Leite Pitman, one of the few scientists to successfully track down and study the elusive creature as it moves quietly through the forest. Gravedig ..read more

The difference between order and chaos can depend on your perspective. The systems and processes that drive the natural world might seem random in close-up, whether it’s an ant wandering around near its nest, or a wildebeest charging through the water. But if you zoom out, you can see how these small activities combine to form part of a bigger picture. The Darwin Tree Of Life project is an attempt to bring order to nature by sequencing the DNA of every living thing in the UK, a staggering 70,000 species. The research team explains how they’ll keep on target by doing a little light sequencing ..read more

Sebastian is not afraid to admit that he lacks natural rhythm. But Rutendo thinks he’s too hard on himself – perhaps the world is just out of sync with him. Besides, every living thing is built upon natural rhythms, from our response to night and day, to the beating of our hearts. Kristina Bolinder leads us on an exploration of a plant with a very unusual habit: it only flowers under the light of the full moon. The reason why connects a century of lunar records with the latest in botanical research. Deep in the Budongo Forest in Uganda, a team of researchers has been following a group of chi ..read more

In an age of individualism, sometimes we are more connected than we think. And the same is true for everything on the planet. Rutendo and Sebastian explore the question of how and why we define an individual, a colony, or a group, across the animal kingdom. Lisa Kirkendale was astounded when she came across the longest organism ever discovered, a siphonophore off the coast of Australia. Composed of several semi-independent but constantly connected parts known as zooids, could it be seen as a colony of many creatures, or just one? Richard Youell, a beekeeper and sound recordist, uses innovati ..read more

It’s a scary world out there, as we explore how everything on the planet – from humankind to glaciers – must be able to respond to threat in order to survive. Sebastian surprises Rutendo with a story of the time he lived in Japan and took up fencing, occasionally finding himself at the wrong end of a sword. WWE wrestler and commentator Stu Bennett, better known as Bad News Barrett, is used to feeling the pressure in the ring. But away from that controlled environment, he has faced less expected threats, including an underwater close encounter with an enormous moray eel. He also shares his con ..read more

Light and reflection are crucial across the animal kingdom, and sometimes they interact in strange and surprising ways. Rutendo tells Sebastian about the time she carried out a classic experiment, the mirror test, with lions, during her PhD. Some lions made friends with the mirrors, while others pursued less wholesome activities... The hatchet fish has evolved a fascinating means of hiding itself from predators, especially those searching out their prey with giant bioluminescent headlights. Biologist Alison Sweeney explains how the fish is able to disappear almost completely, using a combina ..read more

Sebastian and Rutendo celebrate nature’s defenders in all their forms. They argue that vultures should get more credit for their vital role as scavengers. Their super-acidic stomachs kill off deadly bacteria, like anthrax, that accumulates onrotting carcasses. This prevents the spread of disease and recycles nutrients back into the environment. Molecular biologist Mike Kolomiets tells us that the fragrance of newly mown grass isactually a scream for help and a warning to nearby plants that a herbivore is around. Grass can defend itself by releasing toxic metabolites and summoning the assistan ..read more

Rutendo and Sebastian are looking at stories and whether it matters who is telling them. Paula Kahumbu is a renowned conservationist and film-maker in Kenya who wants to see more African stories told by Africans for Africans. “It's really important that Iam empowered to tell my own story. Not just that it's authentic, which therefore will resonate with the audiences ...but also it boosts my ability to have more impact out there.” Through her programme: ‘Wildlife Warriors’, Paula is training, championing and inspiring future generations of Africans to pursue careers in nature. Storytelling mig ..read more

We explore the invisible pulling powers of nature through the forces of smell, sound and gravity. In Greece, desert ants start their lives underground in total darkness. Void of landmarks and sun they initially learn to orient themselves using the Earth’s magnetic field. German scientist Dr Pauline Fleischman reveals how her team discovered the ant’s internal GPS. A healthy coral reef is a very noisy place, full of the snapping, rasping, scraping and croaking of various vocal species. But a dying reef is tragically quiet, devoid of the life which can no longer survive on it. However, conserv ..read more

Rutendo and Sebastian explore death and its role in the natural world. For Sebastian, death is a permanent state, a complete end to a life. But for Rutendo and her family, death is just a temporary parting. Around the world burial customs differ, but throughout nature, death and decay provide sustenance to other life-forms.   Sebastian explores the extraordinary diversity within the ground, with soil ecologist Frank Ashwood, who explains that a single teaspoon of healthy soil contains more than a billion organisms. Among them, the nematode worm – the most abundant organism on the planet ..read more