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Science: New clinics allow African researchers to test the latest drugs locally. But the logistical problems remain a challenge
Peru: Matt Barker gave a remote community near the border with Ecuador mobile phones and a camcorder to create a series of messages that are being broadcast on the web to highlight their health issues
Discovery: a social networking craze known as 'flogging', a mixture of photography and blogging, has taken off in Argentina. Flogger Marco Emiliano Colom describes his unexpected rush to internet fame
Discovery: Dr Clyde Snow, the father of forensic anthropology, worked on the John Wayne Gacey murder case in the US and testified against Saddam Hussein
Nasa scientist Steve W Squyres describes what it's like to man the controls of Opportunity and Spirit, the two planetary exploration rovers that are exceeding expectations as they search for signs of life on the surface of Mars
Nasa astronaut Mike Foale has spent more than a year in space, racking up stints at the Hubble Telescope, Mir and International space stations. He shares his unique experiences of life in zero gravity
