David Loyn investigates how a lost record is helping Afghanistan address its painful past.
BBC Radio 4
Britain declares war on Germany.
Kathy Willis explores the harnessing of plants' ability to photosynthesise their own food.
5/6 Austria-Hungary's declaration of war on Serbia threatens to drag all of Europe into a war.
The British foreign secretary speaks in favour of war at the House of Commons.
Tweli Griffiths yn edrych ar hanes y Rhyfel Mawr 1914-1918 fesul blwyddyn.
BBC Radio Cymru
Jarvis Cocker uncovers an album made by Sir John Betjeman in 1974.
The British cabinet is split over whether to join the war.
13/30 Writer David Almond discusses Caedmon, the earliest English poet whose name is known.
BBC Radio 3
The German government receives word that Britain will remain neutral.
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