A look at nodes and miners in managing bitcoin transactions

See how the concept of verification and addition to the blockchain works in real time.

Every transaction made via bitcoin is recorded on its blockchain—the decentralized, distributed ledger that provides a permanent and transparent record of the currency's entire history. While that may sound abstract, the technology allows anyone to monitor and confirm each of the transactions.

Bitcoin mining validates/adds bitcoin transactions onto the blockchain

Mining, done by a decentralized network of actors, is incredibly energy intensive, making the award of bitcoins a major incentive.

A visual guide to how bitcoin transactions work and rely on cryptography

The "crypto-" in cryptocurrencies like bitcoin refers to the mathematical functions that generate pairs of public and private keys and encrypt data in blocks. When combined, these systems secure transactions on the network, verify digital asset and token transfers, and contribute to end-user anonymity.

Blockchain, explained in five layers of difficulty

Blockchain, the key technology behind bitcoin, is a new network that helps decentralize trade and allows for more peer-to-peer transactions. Wired challenged political scientist and blockchain researcher Bettina Warburg to explain blockchain technology to five different people: a child, a teen, a college student, a grad student, and an expert.

Only 21 million bitcoin will ever be created—what happens then?

Bitcoin is a popular cryptocurrency with a finite supply, and the issuance of new bitcoins is currently offered as a reward for verifying the transactions on the blockchain. Experts say the currency won't reach its limit until the year 2140, and miners may ultimately rely on transaction fees.

Money laundering is a three-step process: placement, layering, and integration

"Placement" occurs when dirty money is introduced into the financial system. Then "layering" happens when the money is moved around to disguise where it actually came from. Finally, the money is placed in other assets or investments in a step called integration.

A list of major companies that accept cryptocurrency as payment

Have a fistful of Bitcoin? SpendMeNot provides a fascinating infographic that shows which companies currently accept the cryptocurrency. If you want to know where you can engage in Bitcoin transactions, this extensive resource directs you to the right merchants. Food, jewelry, banks, travel services and more are all represented here.

Many bitcoin enthusiasts have compared the cryptocurrency to digital gold

Gold is valued for its stability and reliability, serving as a hedge against inflation and economic uncertainty. Bitcoin shares both of these characteristics, but also provides near-instant liquidity and isn’t subject to government regulation.

Onion routing disguises internet traffic in layers resembling a nesting doll

Data is encrypted at least three times before being sent to a node—a server that can only decrypt one layer. Then, the underlying encrypted data is relayed to another node, and the process repeats until all layers are decrypted. Thousands of possible nodes make it extremely difficult to trace activity within the system.

What are smart contracts?

Smart contracts are potentially one of the most useful tools associated with blockchain, and they can enable the transfer of everything from Bitcoin and fiat currency to goods transported around the world. Here’s what they do and why they’re likely to gain traction.

Read the original white paper from Satoshi Nakamoto

Satoshi Nakamoto's original introductory paper "Bitcoin: A Peer-to-Peer Electronic Cash System," is required reading for anyone who wishes to understand the cryptocurrency. Bitcoin.org provides assorted translations. While Nakamoto's identity remains a mystery, his ideas are neatly laid out here, along with supporting documentation.

Princeton University offers a free online bitcoin course

Want to understand bitcoin and cryptocurrencies? A free online course from Princeton University unpacks the details of bitcoin, from how it works to what distinguishes it from other currencies, to the security and anonymity associated with its use. Explore explainer videos, or take the course as a series of lessons.

Merchants have to pay credit card transaction fees each time a card is swiped

Credit card networks such as Visa, Mastercard, and American Express must calculate fees for not only the customer, but also the merchant in every transaction.

What do investment bankers actually do?

Investment bankers organize large financial transactions at a high level. But what does that look like day to day? A video breaks down the specifics about the transactions and deals investment bankers work on, and which members of an investment banking team have eyes on each project.

NFTs can be minted using an online marketplace or directly on the blockchain

Minting, or creating, an NFT is how NFTs are added to the blockchain. The process can be simplified by using a popular marketplace.

Transistors are the foundation of electronic signal processing

Small amounts of voltage can allow or block the flow of electrons across a transistor made from modified layers of semiconducting materials. The conducting (1) and insulating (0) states can be quickly modified as binary code is processed in a computer system.

Making sense of the parts of a check

Though individuals use checks sparingly if at all, half of businesses rely heavily on check-writing to pay suppliers and contractors. Get to know the parts of a check with this visual guide.

How exchanges like the Chicago Mercantile act as trading referees

Chicago's Mercantile Exchange emphasizes futures contracts on commodities. This podcast episode breaks down how exchanges actually work, make money, and streamline the market.

The story of a bitcoin loophole that gave one man millions

James Parker discovered a glitch in an Australian cryptocurrency exchange that would allow him to cash in credits worth over $20M and make big gifts to his friends. Like most loopholes, the authorities found out, but not before his life was transformed. The first in a six-part series.

Both individuals and businesses can establish trusts

Business trusts can allow trustees to manage a beneficiary’s stake in a business, and more. There are many different specific types of business trusts.

From bartering to banking, temples to electronic transactions, here’s banking has evolved significantly since ancient times

A few historical facts about banking (like that one day, not long ago, certificates of deposit were physical pieces of paper) may not surprise you. But did you know that the church was the original lender? And that Julius Caesar himself invented foreclosure?

How to stake Ethereum

Ethereum switched to a proof-of-stake method for validating transactions in recent years, and now investors can stake 32 ether to participate and earn rewards. Several ways to get involved in ether staking exist, with varying levels of income, difficulty, and impact. Some allow users to stake less than 32 ether by pooling funds with other users, while others require less advanced hardware. Read about the different staking methods here.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

Neural rhythms shape how we move, focus, remember, and interact with the world

Millions of neurons in the brain produce rhythmic electrical signals, or brain waves, that guide physical movement and help form and store memories. Researchers also use these rhythms to create brain-computer interfaces, letting people control devices using only their thoughts.

Watch how deep-sea mining equipment collects and processes polymetallic nodules—metal-rich, potato-shaped rocks—from the ocean floor and creates environmentally damaging plumes of sediments.

Explore the human and environmental resources needed to make an electric vehicle

The minerals needed to build batteries for electric vehicles are expensive and often take a human toll paid by the communities where they are mined. This interactive article details what minerals make up an electric vehicle battery, where they come from, and dangers posed by the mining process.

The designs on US coins have changed a lot over the years

From states producing and issuing their own coins after the Revolutionary War, to collectors’ coins in modern times, US coins have had many design changes throughout history. You can learn about the different variations, plus what design elements are added to all US coins today, in an article.

The US dollar is the most widely circulated currency in the world, and is involved in nearly 90% of global transactions

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

Learn how to read a prospectus, the juicy document that any company must file with the SEC before going public.

Radioactive elements can introduce software errors because the ionizing radiation they produce can detach electrons from atoms, and computer code relies on the distribution of electrons.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

A century of Billboard issues documenting the evolution of popular music.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

Ebola infects and disables immune cells, triggering a cascade of events that leads to small blood clots throughout the body, weakening blood vessels and interrupting blood flow to key organs.

While the sun's gravity keeps the planets in orbit, their gravity also pulls on the sun, causing it and everything else in the solar system to orbit around a mutual balance point called the barycenter—the true center of the solar system.

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

Volcanoes 'die' when their supply of magma runs out, if they are shifted away from their underlying magma reservoir, or if they get clogged by collapsing or their magma cooling back into rock.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

This site reaches millions of visitors who are tired of AI chatbots and seeking human connection. Pretend to be an AI chatbot and ask questions, provide answers, and draw for people in real time.

English mathematician Ada Lovelace wrote the first computer algorithm a century before computers existed and hypothesized that computing devices would one day be able to compose music—foreseeing the generative AI systems of today.

Long before Major League Baseball began allowing instant replay for balls and strikes, an umpire reluctantly used the technology to determine whether a hit was a home run, a move that inadvertently ushered in a new era for the sport.

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.

Use this tool to calculate the dollar value of your parental mental load, from meal planning to coordinating after-school care, then see resources that help generate solutions.

Researchers believe the brain consolidates memories, processes emotions, and plans for the future during dream states

Listen to an in-depth conversation on the links between Parkinson's disease and herbicide exposure and the challenging pace of scientific investigation.

Watch contemporary footage covering the US-backed Shah of Iran fleeing the country in the face of the 1979 Iranian Revolution

NBA superstar Victor Wembanyama spent the 2025 summer training with monks in central China to enhance his body and mind.