The US secretary of state rejects an offer of talks with President Vladimir Putin over Ukraine until Moscow engages with US proposals on the crisis.
Oscar Pistorius had a 'big love for guns', a friend tells his murder trial as he describes two firearms incidents involving the Paralympic athlete.
Internet companies Alibaba and Tencent are shortlisted as pioneers of a pilot programme to set up private banks in China, as the country opens up its financial sector
Kanye West's well-publicised narcissism rubs many the wrong way. But Greg Kot argues that a big head can lead to big ambition – and yield formidable art.
Data is collected from fields, warehouses - and even animals' stomachs. The BBC's Paul Rubens asks if it may be the key to preventing widespread hunger.
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