Old credit cards can be made into guitar picks, phone stands and more

Chip technology replaced magstripes to stop easy card cloning and fraud

The magstripe on bank cards always gives the same data, making it simple to copy using a device called a grabber. In contrast, embedded chips create a unique code with every transaction, making it much harder to clone or steal card information.

Managing too many credit cards can be costly if they have annual fees

However, canceling cards must be strategic if it becomes necessary, as it can negatively impact your credit score. Before canceling, experts suggest asking if it's possible to downgrade to a no-annual-fee version in order to keep the account open, thus preventing potential hits to your credit score.

Over one-third of Americans have lost money on a gift card

They've done so by letting it expire (20%), losing the card (17%), or due to a retailer going out of business before they could redeem a card (12%). That's according to The Wall Street Journal, which cited Bankrate research from 2024. This article explains how to maximize your gift card's value.

Contactless credit cards descend from a batteryless Cold War listening device

The same physics that let Soviet spies eavesdrop on the US ambassador in 1945 underlie contactless payment methods today. The device is a passive chip powered wirelessly by incoming radio waves.

See an original Diner’s Club charge card

Before credit cards, there were charge cards from companies like Diner’s Club. While credit cards allow cardholders to carry a balance from month to month (potentially accruing interest), charge cards like Diner’s Club cards had to be paid off right away.

Financial institutions check for lots of things before authorizing a purchase

Before authorizing a purchase, card issuers consider whether or not the cardholder has a high enough available credit limit to make the purchase, where the purchase is being made in order to reduce fraud, and more.

How to safely dispose of every kind of battery

As lithium-ion batteries have proliferated in phones, e-bikes, power tools, and dozens of other devices, improper disposal has become a leading cause of fires in recycling facilities and garbage trucks. Battery Safety Now partnered with the US Forest Service's Woodsy Owl campaign to provide guidance on how to recycle batteries by type, including locator tools for drop-off sites.

Cardboard thieves are making millions

The global market for recycled cardboard is worth billions of dollars—and it's attracting criminals. Specifically, people are making a fortune from taking used cardboard that's been left outside to be recycled, then proceeding to sell it. As a result, legitimate recycling firms and local authorities are missing out on millions. Learn more here.

Rewards credit cards can offer points, travel miles, and more

For every dollar that a cardholder spends on a rewards credit card, they can also receive benefits such as cash back, airline miles, and more. For many, rewards are the reason they make so many purchases on credit cards in the first place.

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

American Express is targeting Gen Z, who are generally less risk-averse than older generations

Unlike Millennials, who grew up during the Great Recession in 2008, Gen Z has a higher risk appetite and has grown up with more gamified spending platforms, like online gambling and prediction markets. Analysts say Gen Z's risk appetite makes them prime targets for credit card companies like American Express that can sell younger customers on large benefits in exchange for annual fees.

Hackers once used 'Fortnite' to clean money from stolen credit cards

Hackers using stolen credit cards would create "Fortnite" accounts and purchase V-bucks, the in-game currency. The hackers would then sell the entire "Fortnite" account on sites like eBay. For instance, an account with $100 worth of stolen V-bucks might sell $25 on eBay.

Fiberglass and epoxy resin on blades complicate the recycling of wind turbines

Between 85 and 95% of a turbine's materials—except for the blades—can be recycled. Blades have been left in landfills when not repurposed into playgrounds and sheds, but new processes may allow them to be made into pellets for injection plastics and concrete.

How to rebuild your credit score

It's easy to let your credit score slip without realizing it. Checking your credit score and getting to know what's on your credit report are the first steps to getting to the "700 club," or "good score" range, according to one financial expert.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.

A credit card’s grace period is a minimum of 21 days

Under federal law in the United States, an individual’s credit card payment due date must fall on the same day of each month, at least 21 days after the cardholder’s statement closing date.

3D printing has made musical instruments more accessible

Violins fabricated from durable plastic, rather than being built from wood, can cost hundreds of dollars less, allowing children to try them out without financial pressure. They can be made in colors that appeal to children, sizes tailored to their bodies, and with tactile guides to help visually impaired learners.

Credit monitoring services may oversell the benefits of dark web monitoring

Currently, technology exists to scrape and download data from webpages, which can then be analyzed to identify a user's information. However, scrapers cannot access or remove personal data from dark websites because they are often protected by paywalls, rendering monitoring ineffective beyond reporting publicly available data breaches.

Hacking the body for a future that didn't happen

Journalist Adi Robertson experimented with one of the most accessible biohacks: magnets. Having a tiny magnet in their right ring finger meant they could sense magnetic fields, attract small metal objects, and more. But magnets weaken over time, eroding this new sense. Such implants do more than offer a new way of interacting with the world, they also pose new complications, such as the inability to get an MRI.

Turning trash into music

In a town built on a landfill, a music teacher and young musicians created an orchestra using instruments made entirely from trash. From oil cans to bottle caps, they turned waste into music.

Today, in the US, people can face years in prison for counterfeiting money

There are both federal and state laws that punish people who use or create counterfeit money. The crime can not only trigger hefty fines, but could also lead to decades behind bars.

The long-lost art of coded postage stamps

In the 1800s, the postcard was a relatively new phenomenon, as was the post office. In the burgeoning system, recipients of mail had to sometimes pay prohibitively costly fees to receive it. So to get around the fees, a system of placing stamps on the envelopes in specific ways to communicate—a simple yes or no—was devised by clever mailers and expanded and codified by postcard companies into guides. Learn about the fascinating system here.

CD ladders are an investing strategy in which you buy multiple CDs with different maturity dates

This way, you take advantage of high interest rates with longer-term CDs while keeping liquidity with shorter-term CDs. If you're well acquainted with the basics of CD investing, the Wall Street Journal's Oyin Adedoyin, and guest host Danny Lewis, can tell you how staggering your investments makes good money.

Inside a company making millions on retro, refurbished technology

Retrospekt is one of the many companies flipping old, fan-favorite technology like Polaroids, cassette tapes, and Tamagotchis. Studies show that nostalgia can make people spend money and is one of the driving forces behind the demand for second-hand gadgets.

Critics choose the 2025 ‘Worst in Show’ awards for CES products

Under the motto “Not all innovation is good innovation,” The Repair Association has selected products at CES that are the least private, sustainable, or repairable for consumers—as well as the “Who asked for this?” award. For example, the least repairable award went to the $2,200 Ultrahuman Rare Luxury Smart ring, which can only be charged 500 times—and replacing the battery effectively destroys it.

Visualize the 5,000-year history of consumer credit in one infographic

Consumer loans for agriculture were likely first used around 3500 BCE, but modern consumer credit took many more centuries to be established. England's credit reporting system, for instance, dates back to the early 1800s when a group of English tailors began swapping information about customers who failed to settle their debts.

Gold's electrical conductivity, reflectivity, and catalytic capabilities make it scientifically valuable

Although gold has been prized since its use in 40,000 BCE for decorative purposes, it has more recently served as a replacement for mercury in the production of PVC plastic. Because gold does not react with air or corrode, it has remained in circulation and reused in electronics and biomaterials.

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

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

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.

The use of fungi to detoxify land and water—a process known as mycoremediation—has been used to clean up natural resources affected by the 2025 California wildfires.

When caught in the mouths of cardinal fish, seed shrimp release glowing, bioluminescent chemicals, which alert predators of the cardinal fish, prompting the shrimp's ejection.

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

Tattoos remain visible on your skin thanks to immune cells called macrophages

Massive 3D printers have been used to build homes by stacking layers of 'concrete toothpaste,' a fire-resistant material that effectively insulates against outside noise.

Indefinite cloning of some endangered species may not sustain their longevity because cloning success rates decrease as genetic mutations accumulate.

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

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.

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

Apollo astronauts left items in the moon's 'toss zone,' including golf balls, family photos, and bags of human waste, to make room for lunar rocks.

See a ranking of the best (and worst) Federal Reserve Chairs since 1914 out of the 16 men and women who have held the office since.

To reduce wrinkles in clothing, research recommends gentle wash cycles with more water and tumble drying with smaller loads and longer times.

70 years ago today, city officials in Santa Cruz, California, banned rock 'n' roll to protect its youth from corruption after witnessing a 'provocative' concert the night before.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

Some researchers have labeled nomophobia, the fear of being without your phone, as 'the phobia of the 21st century.'

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

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.

Scientists can determine Earth's past climate conditions by analyzing air trapped in microscopic bubbles within ice cores—columns of compressed snow layers that build up over hundreds of thousands of years.

A Yale student wrote a profound essay about the consulting industry's influence on elite college students that was published in a book of her writing after she died in a post-graduation car accident.