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In January 2014, the Petra Diamonds company announced that it had unearthed a blue diamond (considered very rare) of about 30 carats in a mine in South Africa. In which mine and town, which shares its name with the world's biggest gem-quality diamond (also discovered there) was this discovery made?

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This day last year: Q.846

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In Jan 2017, Finland became the first country in Europe to officially experiment with this socio-economic concept. Similar experiments are scheduled for many Dutch cities and the Canadian city of Ontario in 2017. In the case of Finland, the figure is 560 Euros a month. What concept?

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