INTO THE BITCOIN MINES | On the flat lava plain of Reykjanesbaer, Iceland, near the Arctic Circle, you can find the Bitcoin mines, Nathaniel Popper reports in DealBook. There, more than 100 whirring silver computers, each in a locked cabinet and each cooled by blasts of Arctic air, are the laborers of the virtual mines where Bitcoins are unearthed. The custom-built machines, running an open-source Bitcoin program, perform complex algorithms 24 hours a day, seeking to win a block of 25 new Bitcoins from the virtual currency’s decentralized network.