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 ...

Business

Airbnb expands into hotels, cars, groceries

Airbnb, facing tighter local regulations on short-term home rentals, announced Wednesday it is adding boutique hotels, car rentals and grocery delivery to its app in a bid to transform itself into a one-stop travel shop.

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