Business

Quantifying forks in Bitcoin mining—and their energy cost

Creating new cryptocurrency requires large amounts of computing power, which is used to solve cryptographic puzzles in what is known as proof-of-work mining. When two computers attempt to solve the same puzzle, the first ...

Machine learning & AI

AI raises profound moral questions—for all of humanity to answer

Will you be flagged at the border? Will your mortgage application be approved? During wartime, whose neighborhood would a weapon system target? These are moral choices—about harm and fairness—and they used to be made by people.

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