Voters in Africa's most populous nation, Nigeria, are taking part in presidential elections against the background of militant Islamist violence.
The co-pilot of the Germanwings Airbus which crashed in the French Alps predicted "one day everyone will know my name", his ex-girlfriend says.
Amanda Knox and Raffaele Sollecito are acquitted by Italy's top appeals court of murdering British student Meredith Kercher in 2007 - the final ruling in the case.
What drives people to murder-suicide?
Why do people exchange texts with imaginary partners?
Why did Singapore ban chewing gum?
British teenager who became an unlikely Indian movie star
What kitchen strategy makes rice less fattening?
How Vladimir Putin's KGB days in Germany left a permanent mark
Lewis Hamilton takes pole position for the Malaysian GP as Ferrari's Sebastian Vettel splits the Mercedes in a rain-hit qualifying.