In June 1908, a massive explosion in a remote part of Siberia flattened the forest with the force of 1000 Hiroshima bombs. But the area was so remote and the times so turbulent, that no one attempted to find out what had happened for 20 years.

Prince Harry joins four injured British soldiers on an expedition in the Antarctic as part of the Walking with the Wounded South Pole Allied Challenge 2013.

In the first of two parts, Guy Disney, Duncan Slater, Ibrar Ali and Kate Philp undertake intensive training as they prepare to take on teams from the US and the Commonwealth in the 125-mile race.

From obesity to alcohol misuse, from rotting baby teeth to hearing problems caused by passive smoking – Britain’s largest children’s hospital is treating younger and younger patients for health problems which are ultimately preventable.

War coverage becomes difficult when journalists become targets for the enemy and the military controls access to the stories.

Reporters At War is a three-part series that takes a long hard look at one of the most dramatic and dangerous careers of modern times, that of the war correspondent.

Every day families at the liver transplant unit of St James’ Hospital in Leeds are faced with life and death decisions. With a chronic shortage of organ donors in the UK, family members are faced with a life-threatening dilemma over whether to donate half their liver in a risky attempt to save a loved one.

Vicky Swales, at just 16, got engaged to her soldier boyfriend Craig Wood, during his two week R&R from his tour of Afghanistan. Less than two weeks later, Craig was hit by a roadside explosive.

Five Bangkok slum children are saved from poverty, disease and abuse by art and the dedicated care of a maverick priest. Father Joe Maier moved to Klong Toey 45 years ago to help the poor and sick.

Nick and Sophie, from Cambridgeshire, were in the middle of searching for a home together when Nick was diagnosed with a rare form of cancer. Thankfully Nick survived, but was left without his sight.