Camila Domonoske

Most American automobiles are powered by internal combustion engines: Gas or diesel goes in, tiny explosions power pistons and turn a crankshaft, the car moves forward, and carbon dioxide goes out.

But a growing chorus of environmental activists, business analysts and auto executives are predicting a sea change as battery-powered electric vehicles grow in popularity.

Harley-Davidsons are famous for their iconic deep rumble. But the Milwaukee-based motorcycle maker's latest model features an electric motor that emits a high-pitched whirring sound. Will Harley fans go along for the ride?

After five years of tweaking and preparation, Harley-Davidson's long-awaited electric motorcycle will start rolling out to dealerships this summer.

Tesla is finally making a profit. For the first time, the California-based electric carmaker has posted two quarterly profits in a row.

Those profits were driven by pricey cars — higher-priced variants of Tesla's new Model 3, which sell for $50,000 and up.

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Tesla is reducing its workforce by 7 percent — more than 3,000 jobs, according to a recent staffing estimate — as the company continues its efforts to bring lower-cost electric vehicles to market.

CEO Elon Musk announced the layoffs on Friday in an email to staff, saying the company is facing "an extremely difficult challenge."

Gas is relatively cheap these days. Enjoy those low prices, but don't get used to them, analysts say.

An oversupply of oil on the world market has triggered a steady slide in gas prices, bringing Americans some of the cheapest gas in years as 2019 kicked off.

Nationally, regular was averaging around $2.25 per gallon at the start of January — the lowest price for this time of year since 2016, according to AAA.

It's welcome news for drivers. Just last summer, gas prices were at four-year highs.

Ford Motor Co. is cutting jobs in Europe and backing away from less profitable models as part of a major restructuring effort, the company announced Thursday. It's the latest sign of big changes in a global auto industry.

Updated at 2:20 p.m. ET

Migrants who cross the U.S. Southern border and seek asylum will be required to wait in Mexico while their claims are being processed, Homeland Security Secretary Kirstjen Nielsen said Thursday.

Currently, most people requesting asylum are allowed to stay in the U.S. — sometimes in detention — while their claim is pending in immigration court. The new policy will send such migrants to Mexico for the duration of that process.

More journalists were killed, imprisoned and held hostage in 2018 than the year before, according to the latest annual report from Reporters Without Borders.

In the first 11 months of the year, 348 journalists were detained and 60 were held hostage, the organization found. Eighty were killed.

Reporters Without Borders — known as RSF, for its French name, Reporters Sans Frontieres — released the report on Tuesday.

Updated at 4:20 p.m. ET

Penny Marshall, who became a household name as Laverne in the TV sitcom Laverne & Shirley and went on to direct several popular movies, has died at the age of 75.

Marshall died Monday night at her Los Angeles home from complications of diabetes, family publicist Michelle Bega tells NPR.

Massive waves are breaking along the coast of California, and the National Weather Service is warning of "potentially life-threatening conditions" and urging people to stay away from the water.

Forecasters began warning of high waves over the weekend, saying a swell would strike Sunday afternoon through Tuesday, with the peak on Monday morning. The NWS warned of waves that could reach "50+ feet at favored breaks."

The U.S. bank Goldman Sachs is facing criminal charges in Malaysia in connection with a massive corruption scheme known as the 1MDB scandal.

That scandal — involving billions of dollars allegedly siphoned from the "1MDB" development fund — has already brought down Malaysia's former prime minister. Several of the fund's top administrators in Malaysia have been charged with corruption in both U.S. and Malaysian courts. They deny the allegations.

This month, a comet called 46P/Wirtanen is doing a dramatic fly-by, giving Earth an unusually good view of its greenish glow.

The timing of the comet's apparition — and its seasonally appropriate coloring — have led some to dub it the "Christmas Comet."

For nearly two weeks in September, developers who created apps for Facebook were able to access user photos that they should never have been allowed to see, the social media company announced Friday.

Up to 6.8 million users may have been affected, Facebook says.

The "bug" affects users who gave permission to a third-party app to access their Facebook photos. Normally, that would only include photos that someone actually posted to their timeline.

A controversial statue of the Indian civil rights leader Mohandas Gandhi has been removed from the The University of Ghana campus, two years after it was installed and faculty promptly began protesting for its removal.

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