Austria-Hungary declares war on Serbia.
Prof Kathy Willis examines the Victorian race to flower the Amazonian water lily.
4/6 Margaret Macmillan tells the story of the events leading up to the First World War.
Reactions to British soldiers shooting unarmed protesters in Dublin.
Peter Hennessy examines Britain's secret war planning and preparations before August 1914.
The British foreign secretary proposes mediation to settle the Balkan crisis.
Margaret Macmillan tells the story of the events leading up to the First World War.
Joseph Hooker and the new laws of what grows where and why.
Britain and Russia react to Austria-Hungary's ultimatum.
Fungi and the birth of plant pathology.
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