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Physicist Mildred Dresselhaus's work has led the way for developments in nanotechnology
BBC World Service Online
The anti-apartheid activist on the changing role of women in the last 80 years.
Dr Alice Rivlin on advising President Obama on solutions to the US's financial crisis.
India's Professor Romila Thapar, on the changing role of women in the last 80 years.
Iceland's ex-president Vigdis Finnbogadottir on the changing role of women.