The Keeling curve

How a young American scientist began the work that would show how our climate is changing. His name was Charles Keeling and he meticulously recorded levels of CO2 in the atmosphere. His wife and son remember him.

Photo: John Giles/PA Wire

Available now

10 minutes

Last on

Sun 6 Jan 2013 01:50 GMT

Cuban History Collection

Fidel Castro and Nikita Khrushchev, Credit: OFF/AFP/Getty Images

Stories from Cuba's recent history and its difficult relationship with the US

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