13 people were killed and more than 20 injured in the school shooting on April 20th 1999
The Columbine massacre
Nato bombs Serbian TV
A survivor from the April 1999 bombing in Belgrade that killed 16 people.
Britain's first vegans
The Vegan Society was established in 1944 by British 'non-dairy vegetarians'
South Africa's first free elections
After Apartheid all South Africans regardless of race finally won the right to vote.
Sri Lanka: A journalist's editorial from the grave
The assassination of newspaper editor, Lasantha Wickramatunga, in 2009 shocked the world
The al-Yamamah arms deals
A record series of arms sales by the UK to Saudi Arabia began in the 1980s
Ellen comes out
Ellen DeGeneres came out as a lesbian on primetime American television in April 1997.
The English poet whose death at the start of World War One was mourned by millions
The Arctic African
Why a boy ran away from West Africa to live in the Arctic in the 1960s.
The sinking of the Belgrano
The Argentine ship was sunk by a British submarine during the Falklands war
The Malayan Emergency
The struggle against a Communist insurgency in Malaya in the 1950s
Jack Ma: The founder of Alibaba
The Chinese billionaire set up his online shopping site in 1999
The siege of Dien Bien Phu
The French surrender at the siege of Dien Bien Phu ended their colonial rule of Vietnam
The groundbreaking school of art and design was founded in 1919
The war on drugs
The first 'war on drugs' was launched by US President Richard Nixon in 1971.
Strictly Come Dancing
One of the most successful TV formats in the world started back in May 2004
The Karakoram highway
The road between Pakistan and China took 20 years to complete
Predicting the financial crash
The economists who predicted the 2008 financial crash but whose warnings were ignored
The final days of Sri Lanka's civil war
How the army finally crushed Tamil Tiger rebels after 25 years of bloody civil war
China's One Child policy
The Chinese Communist Party started ruthlessly enforcing birth control in the early 1980s
Hitler's stolen children
During WW2 the Nazis abducted blonde blue-eyed children to build an Aryan master race
Walking the Great Wall of China
Three friends set off on an epic trek along the Great Wall of China in May 1984
The asteroid that killed the dinosaurs
The Chicxulub impact crater was discovered in 1978.
Fighting Uganda's anti-gay laws
When MPs tried to toughen the laws against homosexuality, LGBT activists took a stand.
How environmental campaign group Greenpeace was formed
The story of how environmental campaign group Greenpeace was formed
The Acid Survivors Foundation
The Bangladesh charity dedicated to treating the survivors of acid attacks.
Melvyn Bragg and guests discuss how we know gas molecules move rather than keep still.
A Ritual Soundscape
David Hendy listens to ancient sounds in Orkney's Ring of Brodgar.
As the Western Mail celebrates its 150th anniversary, Carolyn Hitt explores its history.
Summer BBQ Playlist
Christian Carlisle takes an in depth look at the rich musical heritage of the region.
The Rise of the Shamans
David Hendy explains why sound is central to the shaman's power.