Burkina Faso's opposition renews calls for the immediate resignation of President Blaise Compaore, as hundreds of protesters gather in the capital.
Japan's central bank, the Bank of Japan, surprises markets by announcing an expansion of its monetary stimulus policy.
The BBC's Divya Arya reports from India, where women of 60 and 70 are becoming mothers for the first time.
Within a few metres of you, almost certainly, a vampire is feeding
Could costly, painful injections soon be a thing of the past? Scientists are growing lettuce leaves that produce the vaccines for diseases such as malaria, cholera and polio.
BBC News discovers how a group of metal detectorists try to reunite people with lost jewellery.
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