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Stephen Hawking Dies Aged 76
Hawking was the first to set out a theory of cosmology as a union of relativity and quantum mechanics.
The British theoretical physicist, Stephen Hawking, has died aged seventy-six; a UK government deadline for Russia to explain how a nerve agent was used to attack a former double-agent has passed; and Sierra Leone's opposition leader, Julius Maada Bio, has narrowly won the first round of the presidential election.
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Wed 14 Mar 201805:06GMT
BBC World Service East and Southern Africa & West and Central Africa only
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- Wed 14 Mar 201805:06GMTBBC World Service East and Southern Africa & West and Central Africa only
