Hydrogen vehicle adoption has struggled due to high costs and stiff EV competition

US EV sales grew from 1.4 million vehicles in 2023, to 1.7 million in 2024

California, Florida and Texas have the highest number of electric vehicle registrations in the US, while Mississippi, North Dakota and West Virginia have the lowest. Charging station infrastructure, high costs, and range anxiety contribute to lower adoption rates.

Despite electric usage concerns, EV charging accounts for less than 1% of grid load

Other popular myths about EVs include battery failure concerns—failure rates are less than 1% on newer models—and that there are no places to charge cars, though both at-home outlets and more than 77,000 stations on the road are available.

High fuel prices and fuel shortages revived dormant interest in EVs

Electric vehicles, in the form of motorized carriages, predate the invention of the gas-powered automobile by over 40 years. The latter's affordability made it more popular until technological advances made EVs more viable to consumers in the early 2000s.

Battery and plug-in hybrid EVs can operate with zero tailpipe emissions

Battery electric vehicles only run on electricity, while plug-in hybrids incorporate a small internal combustion engine that recharges the battery or directly powers the wheels to improve driving range. Fuel cell electric vehicles convert hydrogen gas fuel into electricity.

At its peak in 2001, the Toyota Prius made up 77% of the US hybrid vehicle market

Celebrities and early adopters popularized the model, making it a cultural symbol for eco-conscious driving and fuel efficiency. The rise of fully electric vehicles, like Tesla's Model 3, caused the Prius to lose the spotlight.

How lithium has become one of the world's most important elements

Lithium is the driving force behind electric vehicles as the key element in the lithium-ion batteries that power the cars. But as demand for EVs rises, will global lithium supply keep pace with demand? This report projects demand will reach up to four million metric tons of the mineral compound containing lithium by 2030, with batteries accounting for 95% of end-use applications.

BYD overcame Tesla via state backing, cheaper cars, and vertical integration

The one-time battery company eclipsed Tesla in total sales in 2024. The Chinese-backed manufacturer targets low- to mid-tier cars and builds 75% of its components in-house. Its cars typically retail at half the cost of similar Tesla models.

Self-driving vehicles have the potential to cut ride costs by 40-50% and eliminate thousands of road deaths

Author Andrew Miller argues that widespread adoption of self-driving vehicles is no longer a distant promise, as Waymo expands into over 15 cities. However, he warns the technology's biggest remaining hurdles are political: liability, labor, and whether cities embrace or resist the shift.

Hear about the debate over free public transportation

Free public transit boosts economic opportunity and social mobility and is better for the environment. So why do we charge for it? Opponents of free transit cite revenue losses threatening service quality and data showing that free fares don't translate into reduced car use.

Imagining the nostalgia we'll feel one day for gas stations

Car drivers everywhere are accustomed to an endless array of gas stations along the road, with their high, flat roofs, convenience stores of varying quality, and bathroom availability. Current trends in electric vehicle development point to such stations' inevitable obsolescence, and one photographer has begun documenting neglected filling stations in transit-oriented Germany. See the images for yourself and begin the journey toward so-called petronostalgia.

Since its 2019 reveal, the Cybertruck underwent numerous delays and design changes

Elon Musk first envisioned the Cybertruck in 2012, with its design inspired by "Blade Runner" and "The Spy Who Loved Me." Semiconductor shortages and battery manufacturing issues made it impossible to manufacture enough vehicles to meet the 250,000 preorders without shifting delivery dates.

Jet fuel is expensive—which is one reason why it's tough to make an airline profitable

Jet fuel is typically a commercial airline's second-largest expense, second only to labor. Oil prices can be volatile—there have been recent significant increases in jet fuel prices given the 2026 Iran conflict, for instance.

The Reevo hubless ebike, the industry's great failure

The Reevo hubless e-bike came out in 2020, touted as the bicycle of the future with no hubs or spokes, a GPS tracker, a fingerprint reader, and a uniquely futuristic look. With less than 3,000 sold, you've likely never seen one, but this bike reviewer shows off the bike's nightmarishly loud noise, terrible brakes, failed smartphone pairing, and more. Watch the full review here.

Why water is the universal solvent, despite not being good at dissolving many substances

Because oxygen attracts electrons much more strongly than hydrogen does in H₂O, the molecule is polar, with a negative charge at the oxygen atom and positive charges at the hydrogen atoms. These charged regions can attract and pull apart charged portions of other polar molecules, such as washable inks, but are unable to dissolve nonpolar materials, such as glass and asphalt.

Why high-speed rail hasn't worked in the US

High-speed rail connects cities across Europe and Asia, but American attempts have faced ballooning costs and delays. California's failed attempt to connect San Francisco and Los Angeles is the most prominent example of the dysfunction.

Electrical grids worldwide must double their power delivery capacity by 2050 to meet surging demand from AI and electric vehicles.

Why airships are making a comeback as a cheap, fast transport solution

Airships, including blimps, have had a pretty bad reputation since the tragic incendiary crash of the Hindenburg in New Jersey in 1937. But an intense competition is ongoing between airship manufacturers looking to develop the trucks of the sky: a...

The H-bomb is hundreds of times more powerful than the bomb dropped on Hiroshima

Unlike the atomic bombs dropped on Hiroshima, which relied on nuclear fission, the hydrogen bomb uses fusion to unleash vastly greater destructive power. Developed by both superpowers in the 1950s, it gave each the ability to destroy entire cities in seconds.

As of 2025, wave power projects remain in early research and testing phases

Waves can become a steady source of renewable energy because they do not pause like wind and solar power do. However, funding gaps and the effects of storms, salt exposure, and biofouling—mussels and other sea creatures attaching to wave machines—have presented challenges in scaling the technology beyond testing sites.

Why haven’t humans reached Mars?

Mars remains the most viable interplanetary destination due to its relatively habitable orbit. There are many challenges, however, including the huge distance to Mars, the need for advanced propulsion systems, uncertainty over the impacts of long-duration space travel on astronauts, and the need for safe landing techniques and equipment to handle Martian conditions. Human-manned missions to Mars are not likely to occur until the 2030s at the earliest.

Why Earth's atmosphere constantly loses the universe's lightest elements to space

The masses of hydrogen and helium are too small for these gases to be held by Earth's gravitational force, particularly when these atoms are given energy from collisions with high-speed particles from the sun. Although the planet loses a meter-wide balloon's worth of hydrogen every second, it will still take billions of years to exhaust the planet of this element.

Construction of small, affordable starter homes has decreased 75% since the 1970s

Rising costs aren’t the only thing stopping first-time homebuyers from buying real estate—only 9% of recent new construction is for starter homes. The majority of new housing construction focuses on higher-end buyers due to the increased cost of land, labor, and resources.

Artificial photosynthesis turns CO₂ into sustainable fuel

Carbon conversion focuses on a central perplexing question: if carbon dioxide is a leading driver of climate change, and fossil fuels are made of carbon-based molecules, can we devise a way to convert CO₂ into useful alternatives efficiently? This video breaks down a potential pathway using artificial photosynthesis, which uses sunlight to convert CO₂ into fuel.

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.

HSAs are frequently criticized for exacerbating inequality in healthcare access

Health savings accounts offer large tax advantages, but require personal contributions. Some argue that the tax advantages benefit wealthy individuals more than anyone else and that HSAs don't do much to help people who can't afford to regularly contribute to one. As a result, HSAs only decrease costs for those who can comfortably invest in them, and health inequalities between high-income and low-income individuals are exacerbated.

Hydroplaning occurs when a vehicle's tires lose traction on wet roads

Water depth must be over 0.1 inches, and vehicle speed must exceed 50 mph for hydroplaning to occur. Tire wear, size, and tread patterns affect the likelihood of hydroplaning, which is more common for all-wheel drive vehicles.

Ethereum’s biggest risks and top criticisms

As it evolves, critics say Ethereum’s constant changes make the platform overly complex and fundamentally less secure. They also say the Ethereum Foundation and a handful of developers wield too much control over the crypto platform, and that gas fees are prohibitively expensive. Some criticisms are addressed in Ethereum’s roadmap, but others strike at the crypto platform’s core. Go deeper on why here.

How fusion—which releases energy when two lighter atoms combine to form a heavier atom—differs from fission

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

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

Hedge funds, the private investment firms that trade a wide swath of financial assets, make money by imposing steep fees on investors and from the fund's investment performance.

About 2,000 US babies are born annually without some portion of their limbs, potentially leading to a lifetime of pricey prosthetics.

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.

SpaceX's S-1 or 'prospectus' revealed many previously unknown details about the company, including its unprofitability despite doing $18.7B in revenue in 2025, exactly how many voting shares Elon Musk will have in the company (roughly 85%), and more.

Venture capital is a form of funding provided to early-stage companies with high growth potential, typically in exchange for an equity (or ownership) stake

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.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

The 1987 Nintendo video game 'Stadium Events' isn't known for being particularly fun, but its scarcity has made it a highly sought-after item that has sold for up to $35K at auction.

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

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.

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

This real-time tracking of the hantavirus cruise ship outbreak in May 2026 offers a unique glimpse into the global reach of the outbreak and whether the virus sickened passengers and their communities around the world.

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

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

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

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

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.