Black holes generally power some of the brightest objects in the universe, so why is Sagittarius A* so calm?

​No matter how practiced we are at managing our money, it’s never too late to learn new hacks. Try these 10 tips to revamp some of your financial habits.

Medical identity theft is a hassle, but for a person managing a severe health issue, it can be life-threatening. Here's what you need to know.

Rising health insurance costs have many people worried about the financial impact on the family budget.

Most of my life I’ve preferred solo running. But now that I’ve reached a certain age, I’m looking for accountability, community and friendship.

You may think you're stuffed, but sugar has a way of making more space in your stomach, Norwegian researchers discover.

The holiday season is a weighted one, full of food and food-pushers. Here's how to gently, but firmly, stand your ground.

Find out where to fill up with biodiesel on a road trip.

Anything with a diesel engine -- plane, boat, motorcycle -- can run on diesel, straight vegetable oil or biodiesel.

The how and what of powering diesel engines.

Turning fast-food waste oil into clean-burning biodiesel, a father-son duo sees no downside.

Kid Rock is using a sustainable brewery to brew his new American Badass Beer.

Volkswagen is trying to convince Americans that its TDI diesels are as environmentally friendly as hybrids, and it's using sports marketing to get the message a

Marshall Dostal was using fry grease to fuel his cars before taking it another step to create Further soap.

Standing Stone Brewing in Ashland, Ore., has eco-responsibility covered: Bicycles for employees, energy efficient appliances, sustainable food sources.

Carbon Motors' E7 is a purpose-built cop car headed for the market in 2013 (assuming a $300 million government loan comes through). And it's got a BMW turbo die

New findings show that microbes present in biodiesel cause reactions that weaken the steel in fuel storage tanks.

Keep an eye out for the famous biodiesel-powered, peanut-shaped vehicle.

Lipids derived from gator fat meet nearly all of the official standards for high-quality biodiesel.

Five cars vie for the title, but only one will win. Luckily, they're all worthy. Just don't make me watch the awards ceremony, because I hate that stuff.

Electric cars get all the love and the federal money, say diesel and turbo advocates — and they want a level playing field.

Actress and environmental activist Daryl Hannah tells WSJ's Joe White about the biodiesel-powered cars in her garage at the 2012 ECO:nomics conference.

Daniel Gomez Iniguez isn't a typical college student. Gomez and his three partners have developed biodiesel production technology designed to be accessible in a

Virtually sulfur-free biodiesel fuel is available in blends for home oil burners.

Diesels were noisy, smelly, polluting and slow. They're not anymore. Clean diesel is a real alternative, with 650-mile range one big benefit.

A thought-provoking infographic explains how we could be turning our food waste into fuel.

Fair Oaks Farms now powers 42 tractor-trailers with compressed natural gas from methane, the largest project of its kind to date.

Fifteen-year-old Cassandra Lin is changing her community, her state, and her world, one pot of grease at a time.

While cap and trade and the Gulf Oil Spill dominate headlines, congress is taking on issues ranging from Asian Carp to jobs in National Parks.

Enormous holes in sea ice called polynyas are explained with help of robot floats, satellites and tech-equipped seals.

The plan to drill in the Arctic National Wildlife Refuge is hotly contested between oil companies, Alaskans and conservation groups.

First North American Biochar Convention pulls in top Obama brass and puts this fledgling industry on the map.

You may not realize that nutritional yeast is a vitamin-packed protein. Here's how to add it to salads, pastas and more.

Amazonian jungles reveal the secret of El Dorado's wealth -- biochar.

50 technology companies will compete in the clean technology 'Oscars.'

Scientists genetically engineer a new strain of female mosquitoes that cannot fly, hoping the handicap will curb dengue fever outbreaks.

Researchers say the mutant mice study could increase our understanding of perception systems.

New rose will be less prone to wilting and will allow for longer lasting Valentine's Day bouquets.

DARPA using biotechnology in an effort to boost the U.S.'s national defense.

The glove essentially translates sonar into a sense of touch for its wearer.

A biker in South Australia stopped when she saw a koala and it came up to her looking for water.

Here are a few ideas that can help you live a lighter, healthier, more sustainable life.

The International Dark-Sky Association has a few ideas to reduce light pollution from sports facilities.

A study about phones giving kids horns stirs some good old-fashioned moral panic.

In 10 or 20 years, we're going to need a lot of buildings like this senior living community in the Eastlake neighborhood of Seattle — resilient and efficient.

Ambient noise can help mask sounds at night, but pink noise and brown noise may help you more than the white noise you've always heard about.

Experts say we make it easy for germs to invade by touching our eyes, nose and mouth.

They're baaack ... nearly 30 years later, solar panels are once again gracing the roof of America's most famous neoclassical mansion.

Clean energy sources are producing record amounts of power in markets across the world.

WIth room for 5,000 residents, the $26 billion Ocean Spiral scheme offers a subaqueous alternative to overcrowded and costly terrestrial living.