Burkina Faso's President Blaise Compaore says he will stay in power for a year under a transitional government, despite violent protests.
Investment bank Citigroup puts aside an extra $600m to cover legal expenses due to "rapidly evolving regulatory inquiries".
Indian police are hunting for thieves who tunnelled into a bank and fled with valuables worth hundreds of thousands of dollars.
A nearby dwarf galaxy was formed when two even smaller galaxies collided
How do you salvage an ugly argument that ends with a ring tossed into the river? Meet The Ring Finders: a group of metal detectorists who try to reunite people with lost jewellery.
From producing oxygen to forming an extraterrestrial government, the BBC's Richard Hollingham goes on a journey to discover the necessary steps towards life on the red planet.
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