Steve Backshall tries to discover just what makes it possible for a river to stop in the middle of a desert. The Okavango is the world's largest inland delta and home to a one of Africa's greatest congregations of wildlife, and in asking the difficult questions Steve reveals the astounding secret to its existence.

In a revelatory look at Svalbard, the most northerly region in the series, Steve Backshall leaves no stone unturned as he unravels the secrets that lie covered in ice for most of each year. Svalbard is cold, dark and foreboding, yet it is home to the world's largest land predator and the most northerly population.

A look at one of the most famous habitats on the planet, the Serengeti in East Africa, a vast grassland that is home to some of the greatest concentrations of herbivores on the continent. But what is the key to this exceptional grassland that allows such density and diversity?

Steve Backshall lifts the lid on an incredible world of intricate relationships and unexpected hardship in the Amazon rainforest, explores the way that the jungle's inhabitants interact, and reveals a hidden secret that might just be what keeps the whole place alive.

n Australia's red centre, Steve Backshall reveals two-metre-tall kangaroos, the world's most venomous snake and a burrowing toad living among the throng of animals. Parched by the sun, scorched by fire and prone to unpredictable floods, the heart of this island continent is as inhospitable as it gets

Steve Backshall looks at the Scottish Highlands, home to some of the most iconic wildlife in the British Isles. The two contrasting landscapes of open moor and Caledonian forest are both crucially important to their wild inhabitants and yet the history of the Highlands show that they shouldn't exist side by side.

Steve Backshall takes us to a place few have ever visited - the deep sea. 99 per cent of the space on Earth inhabited by life is under the ocean and almost 90 per cent of this is deeper than a kilometre, a place of perpetual darkness and crushing pressure.

In the spectacular Yellowstone where wolves, bears, coyotes, bison and elk roam vast grasslands, wetlands and forests, Steve Backshall looks for the answer to a puzzle.

Professor Richard Fortey (pictured) investigates why islands are natural laboratories of evolution, in this three-part series for BBC Four.

Three-part series in which Professor Richard Fortey investigates why islands are natural laboratories of evolution and meets some of the unique and remarkable species that live on them.

Wildlife documentary series in which naturalist Nick Baker hunts down some of the strangest creatures on the planet. Nick journeys to the Andes to seek out the giant 'saggy-skinned' Lake Titicaca frog, the world's largest aquatic frog

This is the dramatic global story of the first year of COVID-19, tracing the devastation caused by the spread of the virus across four continents.

Michael Mosley tells the story of the creation of our most useful and valuable drugs.

Dr Michael Mosley discovers why we want to control pain and how we ultimately did it.

Exploring early attempts to tackle infection and how we used microbes to fight back.

How scientists went from finding antidotes to poisons to applying poisons as a cure.

As the news of Covid-19 broke, no one knew what to expect. Shot in 21 countries, personal stories from the extraordinary first year of the virus that is changing our world.

From the Amazon to churches in the US and the slums of Delhi, reason and science battle conspiracy and denial.

In the wake of the swine flu outbreak, virologist Dr Mike Leahy uses over 50 years of BBC archive to explore the history of pandemics - infectious diseases caused by bacteria, viruses and parasites.

As pester power kicks in and the computer games' industry launches its latest products on to the Christmas market, Panorama hears from youngsters who've dropped out of school and university to play games for anything up to 21 hours a day.

Panorama investigates the global advance of antibiotic-resistant superbugs and the threat they pose to modern medicine and millions of patients worldwide. Reporter Fergus Walsh travels to India and finds restricted, life-saving antibiotics on sale without prescription and talks to NHS patients whose recovery depends on them.

Panorama reports on the cancer patients who are pioneering a new generation of drug treatments. Patients given just months to live are keeping the disease at bay for years; for some there is even talk of a cure.

Margo MacDonald, the firebrand, independent politician, is one of Scotland's most popular public figures. But she also has Parkinson's Disease and, earlier this year, she spoke openly of her desire to choose the moment of her death. Now, in this deeply personal film, she uncovers the truth about assisted dying, meeting those with illnesses like hers who are desperate to die, and exploring how British law could be changed to allow them to choose when they can.

Jeremy Vine reveals the problem of sexual bullying in our schools and hears from experts, parents and teachers - but most importantly from the kids themselves - on what we can do to tackle it.

On 5 July 1948 the National Health Service was brought into existence, making free public health care available to all, funded by the tax system. To mark the 60th anniversary of the NHS, the BBC will be presenting a series of programmes and features. This programme will look at the increasing involvement of the private sector in the Health Service asking what it means of the future

Panorama's John Sweeney investigates the row behind Shaken Baby Syndrome following the conviction of childminder Keran Henderson.

Jeremy Vine, Sophie Raworth and Fergus Walsh travel through the UK and the world to expose the myths and the dangers of swine flu. Who is most vulnerable? How do you avoid it? And can the NHS cope?

Panorama talks to pilots who have almost passed out at the controls and passengers who say they've been made ill by toxic fumes. The air breathed on airliners is drawn past the engines and can become polluted by any leaks of engine oil. 'Fume events' are rare but there are no accurate figures of just how many occur each year. Panorama wanted to discover what was really in the air passengers, crew and pilots breathe on planes

The Arctic and Antarctic experience the most extreme seasons on Earth. Time-lapse cameras watch a colony of emperor penguins, transforming them into a single organism. The film reveals new science about the dynamics of emperor penguin behaviour. In the north, unique aerial images show a polar bear swimming more than 100km. Diving for up to two minutes at a time. The exhausted polar bear later attacks a herd of walrus in a true clash of the Titans.

Documentary telling the story of silicon chip inventor Robert Noyce, godfather of today's digital world.