The discovery of nerve growth factor

During the Vietnam War, North Vietnamese VietCong guerrillas built a vast network of tunnels in the south of the country as part of the insurgency against the South Vietnamese government and their American allies. The tunnel network was a key base and shelter for the North Vietna ...  Show more

In 1971, advertising writer Roger Hargreaves's eight-year-old son Adam asked him an unusual question: 'What does a tickle look like?'Inspired, Roger got out his marker pens and created an orange character with a round body, long stretchy arms and a blue bowler hat. That character ...  Show more

In the chaos of the helicopter evacuation from Saigon in April 1975, Doan Hoàng Curtis' sister was somehow left behind. It would haunt her family for years. Doan was just three years old when her family made it onto one of the last helicopters to leave Saigon as troops from the c ...  Show more

Raoul Wallenberg, a Swedish diplomat, saved thousands of Hungarian Jews from the Nazis during World War Two.Once Soviet troops reached Budapest, Wallenberg reported to Soviet officials on 17 January 1945. But he was never seen in public again. Rumours of his fate have circled eve ...  Show more

Viet Thanh Nguyen's novel The Sympathizer won the Pulitzer Prize for Fiction. Its follow-up takes the lead character to Parisian salons and an underworld of drug dealing so Free Thinking tracks the French connection through film, history and philosophy as Matthew Sweet is joined ...  Show more

Vietnam, or Indochina as it was known, had been under French colonial rule since the nineteenth century. This was until the Vietnamese nationalist group, the Viet Minh, took on the French in 1946. Ho Chi Minh, son of a Confucian scholar, former chef in Boston, and lover of French ...  Show more