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Nicaragua has cut diplomatic ties with Taiwan in favour of China. It's the latest country to turn its back on the island nation which Beijing considers a renegade province to be eventually re-unified with the mainland. Madagascar is a country on the brink of famine, more than 1 million people are battling severe hunger - our correspondent has a special report from there. And why can the zero-gravity environment of space affect your eyesight? We speak to a scientist who's found a solution for astronauts.