Marwa herself looks a little wistful when you ask her about those trips to Germany and to the US - everyone was very kind and very friendly, she remembers.

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Rather than dark and mysterious, it is bright and friendly, the kind of place people meet and become friends through their love of the treasure hunt.

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"Sean is not the stereotypical cop who is kind of intimidating, but rather a friendly and down-to-earth kind of guy that you would want to be friends with, " David Hou, an MIT sophomore, told CNN.

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The 29-year-old mayor described his village as close-knit and friendly, "the kind of place where you'd say, 'oh, it would never happen here'".

BBC: NY manhunt after four shot dead

Generally tranquil, Yuasa is the kind of place where friendly residents chitchat with neighbors and museums and shops are often left open and unattended.

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The butcher had been a good man, friendly to her mother, always offering a kind word and picking out the best cuts for her, but his wife had been mean and silent as she took the money, and sometimes she had kept it a little longer in her hand, staring at it, as if she thought it might be some kind of foreign currency.

NEWYORKER: The Bell Ringer

Eric Park, of Ziba, a design consultancy, reckons companies must also think about drug delivery systems and patient-friendly packaging, which could create a new kind of branded intellectual property that might be more defensible than drug patents.

ECONOMIST: Pharmaceuticals

And depending on what kind of fuel powers that grid ultimately decides how environmentally-friendly the car actually is.

CNN: All About: Greener driving