A new book explains how simple inventions, like the New York City pizza oven, allow certain food producers to dominate their global supply chains.

By Nsikan Akpan, Jamie Leventhal

People are just becoming acquainted with the idea of digital money in the form of cryptocurrencies like bitcoin, where transactions are recorded on a secure distributed database called a blockchain.

By Stephen McKeon, The Conversation

The basic idea of bitcoin is simple: Instead of a financial institution holding a bank ledger, a chain of computers linked through the internet are all using the same software to record and verify every transaction. But how can a…

By Paul Solman

Since it was introduced eight years ago, the digital currency Bitcoin has drawn attention for its rise in value. Like other digital currencies, it uses “blockchain” technology, which helps conduct transactions without using banks or credit card companies as conduits.

By PBS NewsHour