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Jocelyn Bell-Burnell describes her part in the discovery of a new kind of star - a pulsar

Victor Danilov remembers Stalin's collective farms - and the famine that followed

Arthur C Clarke on being a prophet of science fact including satellites and space travel

Roald Sagdeev when the USSR and the US vied with each other to make the greatest advances

Carolyn Shoemaker has found 32 comets. She talks about comets impacting planets

Helen Sharman describes going to the Mir space station in 1991

Herbert Rees and Marion Gerver on how costs spiralled out of control after World War I

The crash resulted in the Great Depression and a recession that was felt worldwide

Ahn Byung-wha on the economic reconstruction of South Korea after the civil war of 1950-53

Nina Toni's parents lost their farm. She now campaigns for the fairer distribution of land

Mohammed Ismail Mia depends on agriculture and tills the land his father farmed before him

Ermanno Spadoni recalls the days when raced around the countryside as a young man

"Previous to the Model T the average person couldn't afford an automobile"

The Volkswagen Beetle became popular with the allied forces in Germany after World War II

Winifred Barber recalls the bustle on the roads in the early part of the 20th Century

Truck driver Stan Herrold has seen the US's road system transformed over the last 40 years

German hyperinflation, the Wall Street crash, becoming a millionaire and losing it all

Organic farming, Soviet collectivization, the mechanisation of agriculture and rice farms

Science fiction, the 'Space Race', discovering stars and comets, and travelling to space

Edgardo Rodriguez - from Honduras - talks about 1998's devastating hurricane

"The mushroom cloud was rising higher and higher... it made me really fearful"

Jack Mapanje is Malawis most famous poet - he was put in prison without trial or charge

Anita Lasker-Wallfisch survived the concentration camps of both Auschwitz and Belsen

Mary Quant's look "It was a look that you could move in, dance in and be alive in"

Renzo Lodoli wore the blackshirt in the Italian army when he went to Ethiopia in 1935

Reiko Nebashi in Japan talks about her impending marriage and the dress she will wear

"It's like a constant reminder of who I am. It always reminds what I'm supposed to do"

Robert MacNamara talks about JFK at the time of the Cuban missile crisis

Tech pioneer Leonard Kleinrock developed the technology to send messages on the internet

Elizabeth Adelt's students live in the outback - they belong to the School of the Air