Explorer Oli France on his 64-day, 3,588-mile 'human powered' journey, cycling alone for 39 days from Death Valley in California to Denali, eventually reaching the summit of one of the world’s most challenging mountains.

Oli spent ten years dreaming of and five years planning ‘The Ultimate Seven’ project – expeditions which will culminate in, hopefully, him becoming the first person to travel from the lowest to the highest point of every continent, under his own steam.

Oli describes the highs and lows of part 2, from close encounters with bears and speeding trucks to traversing the wild Alaskan wilderness where few humans have been, crossing vast glacial crevasses, icy fords and treacherous terrain where zero complacency is essential for survival. 

Dr Jack Wolfson practised as a traditional hospital cardiologist in the States for more than 16 years, following in his eminent father’s footsteps.

An epiphany moment with his now wife, Dr Heather Wolfson, led him on a different journey - to investigate the cause of heart disease and illness, rather than ‘put a Band-Aid’ over the symptoms.

Based in Scottsdale, AZ, Dr Jack runs Natural Heart Doctor, embracing good nutrition, nature, healthy living, avoiding chemicals and toxins in the battle to tackle heart disease – the world’s number one killer – and heal other illnesses.

In this week’s Convex Conversation we explore behavioural science and its role in helping tackle some of the greatest challenges in society.

Behavioural scientist Elspeth Kirkman – Chief Programmes Officer at innovation charity Nesta – reveals how issues like the nation’s health, domestic decarbonisation and the disparity in early childhood are being viewed through different lenses to bring about positive change. 

Elspeth explains how thinking like an artist can improve our decision making – a concept explored in her new book ‘Decisionscape’ - and reveals her shock at delivering a speech at the UN with no idea she was doing it! 

To mark the 80th anniversary of D-Day, Helen joins the Paddle Group, Royal Marines Association, on the Thames in a folding two-man boat, known as a Klepper, made famous by the Cockleshell heroes. 

As she paddles with former Royal Marines corporal Chris Maynard and some of the team preparing to cross the Channel to Normandy, she discovers how these expeditions help personnel from all the forces with their mental health, bridging the no man’s land some experience between serving and civvy street. 

The Paddle Group will re-enact some of the key events and landings of 1944, with 99-year-old veteran Norman Stanley Ashford watching from the beaches. 

Travel writer Catherine Fairweather talks about her new podcast series, Voices from the Frontline, exploring lives shaped by war.

In the first episode she interviews her husband, revered photo-journalist Sir Don McCullin, and recalls how she first heard about Don from foreign correspondent Jon Swain when she was 11, living in Laos during the Indochina Wars.

Catherine’s father was a diplomat and her mother Mikhail Gorbachev and Margaret Thatcher’s translator. Their exciting life living all over the world experiencing different cultures gave her a thirst for adventure which led to a career as a travel editor for magazines like Harper’s Bazaar and Porter. Catherine reveals the places she’s left her heart, including Bhutan in the Himalayas.

Photograph by Max McCullin

Photograph by Sir Don McCullin

Prince William is building 24 sustainable homes on his Duchy of Cornwall land at Nansledan to provide temporary accommodation and support for some of the many people sleeping rough in the county, in partnership with homelessness charity St Petrocs. 

Jon Sparkes OBE is a trustee of St Petrocs; ran Crisis; Scope; is currently CEO of UNICEK UK and is about to move to Mencap, where he’ll be pushing for change for the 1.5 million people in Britain with learning disabilities.  

Jon shares his very personal story of why he ended up in the charity sector, reveals the frustrations and rewards it comes with, and discusses the depths we’ve fallen to in terms of social care policy, including the £7 billion pound reduction in spending on it over the last decade.  

Deep in the sub-basement of the Natural History Museum in London, surrounded by a vast collection of dinosaur bones, world-leading palaeontologist Prof Paul Barrett gives an insight into how prehistoric times can inform current issues like climate change. 

In this golden age for prehistoric reptiles, where on average one new dinosaur is discovered every week, innovative digital tests and detailed online archives mean we can find out more about their life on Earth, our planet & evolution. 

Paul has an armoured dinosaur named after him - Vectipelta Barretti - and describes finding a new fossil, and being the first human to see it, as a moment of pure discovery. 

An insider’s view from former cabinet minister Rory Stewart OBE on the upcoming UK election and the difficulties a new Government will face taking over a country that he believes is bust, with public services we can't afford. 

Rory is already selling out venues like the O2 in the autumn with his The Rest is Politics podcast co-host Alastair Campbell when they'll be debating the issues before the nation votes. 

He shares candid stories from his eye-opening decade at the heart of Government, detailed in his memoir Politics On The Edge, saying there are elements of privilege in elected politics but it’s “bruising beyond imagination and only very unusual personalities usually survive in it.” Rory reveals he’d like to work on public policy for a Labour government, perhaps chairing a commission on Ai in the NHS.

Major General Alastair Bruce OBE is known for his engaging live TV commentary, here and in America, on royal weddings, jubilees, and the King's Coronation, giving viewers an accurate insight into ceremonial life and history.

Alastair - a direct descendant of the revered warrior king Robert the Bruce - is the current Governor of Edinburgh Castle, a role which dates back to 1107. 

He reveals his love of the realm goes back to childhood when he made a detailed replica of the crown jewels from clay and a ballcock! Her late Majesty, Queen Elizabeth 11, was intrigued by his long-held fascination when he filmed a documentary featuring an intimate conversation with the Monarch about her coronation of 1953. 

Alastair has served 45 years in the Army, advised on set throughout the making of Downton Abbey and puts his extraordinary historical and royal knowledge to use on major films, including The King’s Speech.

Former Chief of the Defence Staff General Sir Nick Carter gives his assessment on the current conflicts in the Middle East and Ukraine, as well as reflects on his 45 years serving in the military. 

Sir Nick says the world looks a lot more like it did in the 1910s and 1930s and explains the geopolitics behind why he believes conflict is now possible at a scale and intensity he hoped we’d never see again after 1945 came to an end. 

Britain’s longest serving military chief since Lord Mountbatten shares fascinating stories from the start of his career as an 18-year-old soldier in the Northern Ireland Troubles to advising Prime Ministers and securing billions for defence. 

General Carter is now lecturing at Stanford University in California, advising leading businesses and working for the Tony Blair Institute as well as with the charity Supporting Wounded Veterans.