These are just five of the many interesting things to look out for in 2013, from the future of TV to the rise of wearable computing.

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Rich Laburn, of the Londolozi Game Reserve in South Africa's Kruger National Park, told BBC News there are simple things to look out for - the most obvious being paw prints.

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There are three things to look out for.

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The key things to look out for are extra rewards on holiday-centric spending categories, rebates for shopping at small businesses, and discounts in terms of the number of points or miles needed to redeem for certain goods.

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Dr Morency knew from past experiments that lowering of vocal pitch and pausing were both cues likely to draw a nod from a listener, so these were things that he programmed the system to look out for.

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And we look for discovery and innovation, all these things desired out of the American heart to provide the pursuit of happiness for our citizens.

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"I've been in this job for a long time, so the things that look like defensive wounds turn out not to be, " said Richardson, who has worked in law enforcement and as a paramedic for more than 25 years.

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