Rebels 'retreating' in Sloviansk / World facing polio health emergency / How Dutch team is 3D-printing a full-sized house.

South Sudan government forces move to retake Bentiu/ Nigeria's President asks for understanding in combatting Boko Haram/ why we should talk about...

Ukraine's Prime Minister Yatsenyuk speaks to the BBC/ Reporting from the scene of a huge landslide in Afghanistan/ A bloated whale's tale

Second day of security operation in eastern Ukraine/ Hundreds missing after landslide in Afghanistan/ Dealing with Germany's Nazi past through film

Syria rebels 'to pull out of Homs' / Arrests over Philippine 'sextortion' / UK Biobank to track risk of dementia.

Ukraine re-introduces military conscription / Battle for Aleppo in Syria intensifies / NASA shows off new spacesuit designs.

Northern Ireland police quiz Gerry Adams on woman's murder / Indian mango ban comes into force.

Adams arrested over 40 year-old murder: he denies involvement / Is Iraq truly democratic? / The spread of antibiotic-resistant bacteria

Botched US execution sparks review / Brunei introduces tough Islamic law / Actor Bob Hoskins dies aged 71.

In the eastern Ukrainian city of Luhansk a regional government building is stormed / Donald Sterling gets life ban for racist comments / Polygamy is...