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Before long, the shortest route has the strongest chemical signature, helping other ants learn to use it, said Tshilidzi Marwala, an artificial intelligence engineer and rector of United Nations University. The "ant-based algorithm" and other learning systems, studied by data scientists, are now being used to reduce inefficiencies in manufacturing processes - one way to cut planet-warming emissions.
A polar bear sleeping on an iceberg, a smooching pair of hares and elephant kicking up garbage are just a few of this year's incredible nominees.
Travel Editor Stephen Scourfield analyses the year ahead
From a private jet around the Med to a tour of India’s Golden Triangle – see where your combined household income will take you next year
At 400 kilometres north of the Arctic Circle, Russian journalist Giorgi Chentemirov says he had already been out of the country for six months when the Russian Ministry of Justice labeled him a "forei