Ice Bucket Challenge and Bulgaria's dancing bears

Ice Bucket Challenge and Bulgaria's dancing bears

A warning for Aboriginal and Torres Strait Islander listeners - this programme contains the names and voices of people who have died.

Max Pearson presents a collection of the week's Witness History episodes.

We take a look at the Ice Bucket Challenge, the viral fundraising sensation that took over the internet in 2014.

Our guest Professor Sander van der Linden breaks down the psychology behind virality and outlines the challenges facing those who conquered the algorithm.

Plus, how one man smuggled punk rock over the Berlin Wall.

Also, we meet the man who found a retirement home for Bulgaria's dancing bears.

We hear the remarkable story of Australia's Freedom Riders who campaigned against indigenous discrimination.

Finally, we relive the mountain top escape of the Yazidi's who were fleeing Islamic State Militants.

Contributors: Nancy Frates – Pete Frates mother. Sander van der Linden - Professor of Social Psychology at Cambridge University. Mark Reeder - smuggled punk rock over the Berlin Wall. Dr Amir Khalil – founded the sanctuary for dancing bears. Darce Cassidy and Gary Williams – involved in the Freedom Rides. Mirza Dinnayi - helped evacuate the Yazidi's.

(Photo: Ice Bucket Challenge. Credit:Getty Images)

Jaksot(468)

Autism and the MMR vaccine

Autism and the MMR vaccine

How a British doctor misled the world by linking the MMR vaccine to autism; the early rise of Hungary’s Viktor Orban also what it was like to contest the Soviet Union’s first multi-party elections plus the exposure in the 1970s of a Nazi criminal in Holland and uncovering Mexico’s Aztec past.Photo: Dr Andrew Wakefield arrives at the General Medical Council in London to face a disciplinary panel, July 16th 2007 (Daniel Berehulak/Getty Images)

23 Maalis 201954min

China's breakthrough malaria cure

China's breakthrough malaria cure

How an ancient Chinese remedy provided a 1970s breakthrough in the fight against malaria; the bombing of Dresden in the Second World War that inspired Kurt Vonnegut's anti-war novel Slaughterhouse Five; the fall of Singapore; plus the town that America built in Afghanistan's south-western desert, and 'was Lenin a mushroom' - a satirical re-writing of Soviet history.Photo: Professor Lang Linfu (Family archives)

16 Maalis 201950min

I was abused by a President

I was abused by a President

How allegations of child abuse engulfed Nicaraguan President Daniel Ortega, the campaign to return the Elgin marbles to Greece, Britain's first black headteacher, the origins of the Barbie doll and how Baroness Warsi made history.Photo: Zoilamerica Narváez announces in a press conference that she is filing a law suit against her stepfather Daniel Ortega, March 1998 (RODRIGO ARANGUA/AFP/Getty Images):

9 Maalis 201950min

Venezuela's oil bonanza

Venezuela's oil bonanza

When Venezuela was rich; surviving a mid-air airline disaster; Japan's Red Army militants of the 1970s, the origin of the swine flu epidemic and Iceland's Beer Day. Photo: Seidel/United Archives/UIG via Getty Images

2 Maalis 201950min

The curse of Agent Orange

The curse of Agent Orange

Millions left dead or deformed because of chemicals used in the Vietnam war, UK cigarette smoking warnings ignored, remains of the Nazi 'Angel of Death' discovered in Brazil, the Columbia Shuttle disaster which led to huge questions about American space safety and the unrest featured in the Oscar-nominated film, Roma, where Mexican students were killed by government-trained paramilitary troops.Photo: Child suffering from spinal deformity in rehabilitation centre in Saigon.

23 Helmi 201950min

Iceland jails its bankers

Iceland jails its bankers

Why Iceland jailed 40 bankers after the 2008 financial crisis, how the Maastricht Treaty gave birth to the EU, plus America's first female airline pilots, Cameroon's historic referendum and homeless, drunk and yet a genius in the USSR.(Photo: Protesters on the streets of Reykjavik demand answers from the government and the banks about the country's financial crisis, Nov. 2008. (Halldor Kolbeins/AFP/Getty Images)

16 Helmi 201950min

The last days of Hitler

The last days of Hitler

Hitler's secretary on the last days in the bunker; a CIA operative on the killing of Che Guevara, remembering the US invasion of Iraq, a child of the Soweto Uprising and the tricky task of bringing Disneyland to France. Photo: Getty Images

9 Helmi 201950min

The Iranian Revolution

The Iranian Revolution

In February 1979, Ayatollah Khomeini returned from exile to Iran in the defining moment of a revolution that would change his country and the whole Middle East. In a special edition of the programme, Rebecca Kesby hears eye-witness accounts from the protestors who brought down the Shah, one of the Ayatollah's aides and an American embassy official taken hostage by Khomeini supporters. She also talks to the BBC Persian Service's special correspondent, Kasra Naji.PHOTO: Ayatollah Khomeini returning to Iran (Gabriel Duval, AFP/Getty Images.)

2 Helmi 201949min

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