View a map of the balancing authorities managing electric systems and costs throughout the continental US

Understanding how non-profit entities manage electric grids to ensure supply-demand balance

Independent System Operators in smaller areas and Regional Transmission Organizations that operate across multiple states run wholesale electricity markets. Electricity suppliers can submit competitive bids to meet estimated demand in day-ahead markets while keeping consumer costs low. ISOs and RCOs also inform markets of deviations in these estimates so that suppliers can adjust how much power they generate, which is then bought and sold in real time.

View hourly electricity demand and generation across the continental US

This dashboard maps data from the high-voltage bulk electric power grid based on information from regional electricity balancing authorities. Users can also chart data for up to the past 31 days to observe how forecasted demand compares with actual demand and generation.

Visualize energy sources and uses across the US

Want to understand the basics of America’s current energy situation? The National Academies, advisers to the nation on science, engineering, and medicine, provides objective information about the United States’ current energy sources and uses, as well as a look forward to the future of energy.

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.

Examining the causes of power outages, from system damage to preventative measures

Stray balloons, contact with trees, malfunctioning equipment, and severe weather are among the causes of failures that can cause widespread, unplanned blackouts. Although contingency options that rely on alternative transmission pathways to deliver electricity from generators to consumers may be possible, some shutoffs, brownouts—available power is reduced—and cycles of repeated outages may be intentionally implemented to protect public safety.

View major global infrastructure, including power plants, fuel lines, and water pumping stations

The Open Infrastructure Map displays data from the OpenStreetMap database, which aggregates information from freely licensed geodata sources, surveys, and photographic and satellite imagery. It also displays power lines, generators, substations, various chemical pipelines, telecommunications towers, data centers, and more in daytime and nighttime maps.

Explore a map of every charging station in the US and Canada

An electric vehicle owner's main fear running out of power before getting to their final destination. Using this interactive, users may identify stations and their charger type to map fuel corridors for EV road trips.

Understanding the power grid and how renewable sources fit in

The power grid is evolving to include ever-higher levels of solar and wind, which don’t provide inertia. Should system planners and operators panic?

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

Learn why electrical substations are needed to provide safe electricity with minimal energy loss

These typically fenced-off facilities with steel boxes or cylinders topped with cone-like caps house circuit breakers, fuses, and switches that can isolate sections of the grid to prevent electrical failures from spreading. Substations use transformers to modify electrical voltage and are customized to the generation, transmission, and distribution networks they interconnect.

See where the 94 nuclear reactors in the continental US are located

In 2023, these reactors—located in 53 plants across 28 states—prevented 437 million tons of carbon dioxide emissions. A single fingertip-sized uranium pellet generates as much electricity as a ton of coal, enough for one household's annual electricity.

Find out how much energy in the US comes from renewable sources and other FAQs

Browse frequently asked questions about renewables, from the amount of energy production by state to the cost of electricity generation by power source.

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.

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.

Mapping the world's 25 largest stock exchanges

Totaling a market capitalization of $106T (as of 2023), this map identifies the major stock exchanges worldwide on a map, ranking them by total market value. Nearly half of that value is located in the Americas.

Try to balance the budget

This interactive calculator challenges users to rebalance the federal budget by adjusting taxes and spending. Try your hand at weighing difficult trade-offs that shape long-term deficits, debt growth, and the sustainability of US public finances.

Local governments are responsible for more than 148,000 public water systems across the US

From large municipal utilities to small rural systems, local governments are tasked with providing clean water to almost every American community. The US operates over 148,000 public water systems.

The seven major US freight rail companies

The US railroad industry is dominated by seven long-running freight conglomerates. Get the basics on each of these companies with this brief overview.

The Electoral College was shaped in part to balance North–South power

This article examines how the Electoral College emerged from political compromise, including efforts to placate slave-owning Southern states and concerns that Northern states would dominate a direct national presidential vote.

Of the 12 voting policymakers at every Federal Open Market Committee meeting, 4 are present on a rotating basis

To allow for diverse regional perspectives in the votes on monetary policy, heads of regional banks hold voting power on two- or three-year cycles.

Explore the countries with a federal system—and see how they work

This resource from the Forum of Federations catalogs the world's federal countries. It provides background information on each, including the emergence of federalism, the division of power, and the practical interaction between national and regional governments.

A battery management system determines the displayed battery percentage

The software in modern devices provides values by combining estimates based on voltage—akin to knowing how much air is left in a tire based on the pressure of the escaping air—and coulomb counting, where the rate of electrical current is calibrated to the ratio of remaining charge to full capacity.

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 Office of Air and Radiation oversees America's clean air and climate programs

The office develops and enforces national standards for air quality, vehicle emissions, and radiation protection. In 2025, the EPA announced the closure of two key divisions under the office responsible for regulating climate and air pollution: the Office of Atmospheric Protection and the Office of Air Quality Planning and Standards.

An overview of Earth's atmospheric cells and how they distribute Earth's uneven heating

The Hadley, Ferrel, and Polar cells are circulation patterns that act like gears, moving warmer air from the equator to the poles. The rising and falling of air currents within these patterns creates semi-persistent regions of low and high pressure, which contribute to the formation of regional climates, such as tropical zones.

See the most oddly gerrymandered districts in the US

Based on input from redistricting experts and political scientists, this resource identifies and ranks the most extreme congressional gerrymanders of the 2020s, examining how map design, cracking, and packing reduce competition and distort representation across states.

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.

Water acts as a coolant and a moderator of nuclear reactions in reactors

Nuclear reactions within a containment structure boil water into steam, which drives a turbine that generates electricity. This water is then recirculated via pumps back into the containment structure to repeat the process, with reaction rates lowered by the insertion of control rods that absorb neutrons, which trigger reactions.

Explore a series of articles on the costs of critical mineral extraction

The acquisition of critical minerals—essential materials for clean energy technologies—has often been accompanied by harm to water supplies, natural ecosystems, and Indigenous lands, raising questions about the overall benefit of these technologies.

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.

See the 25 of the best photos of auroras from around the world.

The USPS spent $3.97B in 2024, accounting for .058% of the federal budget.

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

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

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.

Pure water does not conduct electricity because this flow of energy requires the movement of charged particles, and water is a neutral molecule.

While El Niño moves warm Pacific Ocean waters east along the equator, La Niña moves them west, shifting where rainfall will become more common for months.

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.

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

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.

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%.

Dirty lightning is a thunderstorm created from friction between rising and falling flows of ash and smoke during volcanic eruptions.

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

The Great Salt Lake's distinct dual coloration results from high-salinity organisms that only live in the northern portion and produce a purple protein.

Explore what it's like inside a patient isolation unit, used in situations such as treating a patient or suspected patient with Ebola.

Explore chaos in this simulation of two double pendulums, where small differences in the release angles produce wildly different outcomes.

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 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.

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.