The seven major US freight rail companies

Find out how airline mergers created some of today's largest airlines

Four airlines dominate the US commercial airline industry: Delta, United, Southwest, and American. Many of these large companies secured their top spots in the industry via a series of mergers and acquisitions starting in the 1970s, when American acquired Trans Caribbean Airlines.

The steps to the railroad industry's bargaining process

It often takes years for management and labor to come to terms for each five-year agreement. Learn how collective bargaining works for this highly-regulated industry.

Explore a list of well-known monopolies

Many American monopolies popped up during the rapid industrial growth of the Gilded Age. Industries like steel, tobacco, railroads, and telecommunication have all been monopolized at some point in history.

A list of US labor unions

Maybe you’ve heard of the Teamsters, the trucking union that's among the most well-known labor unions in the US. But you might not have heard of the National Association of Letter Carriers. As it turns out, there can be a union for almost every profession, no matter how niche.

The Nasdaq's 'Magnificent 7' have an outsized impact on the Nasdaq 100's performance

These seven companies are Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia, and Tesla. They're often responsible for over 40% of the Nasdaq 100 index's gains, but the exact percentage varies from year to year.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

The Seven Sisters were a dominant midcentury Western oil consortium

Amid the fallout of World War II, Western multinational corporations expanded their control of the production of oil across the oil-rich Middle East, earning the pejorative nickname of the Seven Sisters. In the 1970s, the group’s role diminished as nationalist movements pursued sovereign control of the oil.

The firms running America's voting systems

Three companies make up over 90% of the US market share around voting systems, and like any company, they're priorities aren't always aligned with the public's. Dive into the industry of voting machines in this investigation piece from the Guardian.

Visualizing US state taxes in seven charts

Ever wondered how your state’s tax system compares to others? Here’s an overview of the US state tax system based on seven visualizations.

Why train derailments happen, 101

In 2021 alone, there were over 1,000 reported derailments in the US—and no amount of maneuvering will reduce those numbers to zero. This 101 explains the causes of train derailments and how safety protocols look to limit them each year.

The 25 biggest IPOs in US history

These 25 companies—which include UPS, Uber Technologies, AT&T, and The Kraft Heinz Co.—had some of the biggest IPO drops in US history. However, not all these drops led to long-term (or even immediate) success.

Understanding why the US can't use its own crude oil and depends on global markets

Before advancements in fracking technology made lighter shale oil readily available, US refineries had been built and optimized for decades to process heavier oil from other countries with high profitability. Despite being able to refine lighter oil, US oil companies can operate with better margins by exporting it to other nations whose refineries are optimized for it and importing heavier oil, for which the US has the infrastructure.

Budweiser pioneered refrigerated rail transport for its beer in the 1870s

This enabled Budweiser to achieve national distribution long before competitors, fundamentally transforming the US beer industry. It was also among the earliest large-scale adopters to use pasteurization, allowing it to be shipped long distances without going bad.

The history of the North American power grid, which is composed of five major grids

Thomas Edison's Pearl Street Station was the first US commercial power plant, burning coal to power lamps for some Manhattan residents. Over time, local power plants would be bought out by larger ones, forming interconnected systems spanning multiple states. Today, the Eastern Interconnection and Western Interconnection are the largest of these systems.

Mapping the route options between the Pacific and Atlantic

This map shows some of the alternative trade route options that are available to shipping companies, from overland routes that rely on railways to transport goods coast-to-coast, to Arctic Ocean passages.

Transit is funded through a three-tier system, and the federal government is the smallest piece

In 2019, the federal government covered about one-sixth of the $79B spent on public transit. States and localities make up the rest. About 85% of all transit trips are taken by bus or heavy rail, and nearly 4 in 10 US transit trips occur in the New York City metro area.

The world's top agriculture-producing countries

Agriculture is one of the most important industries in the global economy, and while every country produces some of its own food, some countries dominate the markets. The US, Brazil, and the Netherlands are the world's top three agriculture exporters. See more charts and statistics on the topic with this Investopedia article.

The US has over 4 million miles of roads. Learn about how highways are designed and the geometry behind what makes them safe and efficient

Here's how the seven types of plastics fare in the recycling process

To help you make better-informed decisions about the products that you buy, here's a simple explanation of the seven different types of plastic, how they differ, and their impact on the environment.

The Big Ten is the oldest Division I collegiate athletic conference in the US

Established in 1896 with seven members, the Big Ten has expanded far beyond its Midwestern roots. As of 2024, it includes 18 schools—stretching coast to coast from Rutgers in New Jersey to UCLA in California.

The complicated economics of horse racing

The Triple Crown commands big ratings (and enormous amounts of money in betting) but the sport as a whole is in a precarious position, thanks to limited tracks and an overreliance on subsidies. This special from Freakonomics unpacks what all that means for the future of the sport.

Explore NASCAR’s dozens of tracks across the US and Mexico

See detailed information on every track used for NASCAR’s top three divisions. Tracks vary in shape, length, and seating capacity.

The US has been through 34 recessions since 1854

From 1855 to 2020, the average US recession lasted for an average of 17 months. But in the 20th and 21st centuries, the average recession length has shortened, decreasing to 14 months.

Most of the critical mineral supply needed for US data centers is imported

The country with the most data centers relies on other nations for about 80% of the rare earth elements needed for magnetic materials in storage drives, 64% of the silver and 85% of the platinum it uses for electrical circuitry, and about half the aluminum and copper used in heat sinks that dissipate thermal energy from electronic components.

Utility companies are often considered 'natural' monopolies

Natural monopolies occur in industries where the upfront costs of entering the market are high, making competition unrealistic. Investor-owned power companies, like Duke Energy, often have natural monopolies, as building alternative power grids and transmission lines is too expensive and impractical for competitors.

How companies track you around the internet, explained

Being able to track how users behave on websites is a massive opportunity for companies to hone their products, target their ads, and more. Dozens of trackers are on the average website you visit, depending on how you deal with that site's cookie policy, and Google is the chief tracker of them all. Learn about these companies and what they are tracking with this informative blog visualization.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

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

View the ten deadliest tornadoes in US history.

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

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

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

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

See how Budweiser's famous Clydesdales spend their days at Warm Springs Ranch, where roughly 70 to 80 of the beer brand's giant horses can be found at any given time.

Despite being favored by 87% of Americans, Congress does not have term limits.

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

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Some renewable energy sources may weaken the resiliency of electric grids by removing outage buffers provided by coal- and natural gas-fired plants, which provide the system with more time to find a new power source if a plant goes down.

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

The 19th-century painters of the Hudson River School were among the first American romantics, with portraits that displayed the natural beauty of the young country.

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

Explore the animals that populate the depths of the ocean, from fish and coral in the first few hundred feet, all the way down to the bottom of the Mariana Trench.

Human-to-human transmission of hantavirus remains extremely rare, so the 2026 hantavirus cruise ship outbreak doesn't mean we're facing a COVID-style pandemic risk.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

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

Crows are believed to have intelligence on par with a seven-year-old child and demonstrate complex behaviors, from problem-solving with tools to recognizing human faces.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight