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Geoff Watts asks why the source of new medical drugs is drying up.
Melvyn Bragg discusses the Sassanian Empire in Persia from the 3rd to the 7th century AD.
Melvyn Bragg examines how perceptions of science have changed in the 20th century.
Melvyn Bragg examines whether science has ruined our sense of poetic wonder at the world.
Melvyn Bragg explores the origin of the concept and the historical role of the scientist.
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