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Ancient Greek algorithm could be used to find inconceivably large prime numbers

The sieve of Eratosthenes is an ancient tool for finding primes, but it might get a boost by modern computing.




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Scientists measure the smallest increment of time ever recorded

The breakthrough will allow for stunning time lapses that reveal the behavior of electrons.



  • Research & Innovations

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Gmail plug-in means never having to say you're sorry

Just Not Sorry app helps women (and men) stop undermining their email messages with qualifiers and apologies.




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Video game 'Easter eggs' are reaching Da Vinci Code-like levels

Solving secret codes hidden within video games could soon spill over into real life mysteries.



  • Arts & Culture

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Electric vehicle start-up receives $350 million investment

Add $350 million to the already invested $350 million, and EV network start-up, Better Place, seems to have plenty of fuel to bring the world an EV network that




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When solar panels are a better investment than stocks

With the right rebates, solar panels can offer a return on investment far higher than you'll find in the S&P 500.




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Obama's Pacific trip brings climate agreements and challenges

As the president leapfrogs from India to Indonesia to Seoul, he's making deals on green energy in the hopes of curbing climate change.



  • Climate & Weather

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6 green ways to invest your income tax refund

Whether you filed your taxes early or are scrambling at the last minute, it's not a bad idea to start planning what to do with your tax refund.




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Harvard betting on timber for endowment

The Harvard University endowment fund lost $10 billion in 2009. Unable to dump toxic investments, the university had to find new ways to recoup this 27 percent



  • Sustainable Business Practices

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Monday medley: The stock market

Facebook RSUs, billionaires' favorite stocks, the weak earnings predictions and more.




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Do you know what's made in America?

Test your knowledge of where products come from and find out if you're a savvy consumer by taking this Made in the USA quiz.



  • Sustainable Business Practices

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​Baugruppen: It's a cooperative living concept, and it's perfect for boomers

This German concept of cooperative living could be a great alternative to the retirement community.



  • Remodeling & Design

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Help me design a custom fair trade Ben & Jerry's flavor

Ben & Jerry's has invited me to create my own custom flavor using fair trade ingredients next month- help me out with some tasty ideas.



  • Wilderness & Resources

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When chocolate met maca

MNN's lifestyle blogger loves the sweet and crunchy taste of Chocolate Maca Chunk — a raw, organic, vegan and fair trade chocolate bar handcrafted by Lulu's C




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On International Women's Day, a big cheer for a young woman

For International Women's Day, check out 10-year-old blogger Hannah who writes about the environment and social issues.




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When buying chocolate becomes complicated

Have you considered the impact of your purchasing decisions? That's what I've been doing — again.




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What do you know about the farmer who grew your coffee?

Forthcoming documentary follows movement to link poor growers with roasters and consumers.



  • Sustainable Business Practices

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October is Fair Trade Month, but being fair to farmers should be a year-round thing

My family is starting off the chilly fall mornings fairly with ethically sourced coffee and hot chocolate.




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I don't like fair trade sometimes, and here's why

I do support fair trade products, but sometimes I wish I didn't.




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Filament bulbs: Is ambiance worth the cost to the planet?

Antique bulbs create retro vibe but also are the most-energy guzzling option for restaurants.



  • Gadgets & Electronics

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Sneak peek of the Philly Homegrown Tour

City Food Tours has a delicious new walking tour dedicated to showcasing local foods.



  • Organic Farming & Gardening

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2011 James Beard Award nominees announced

You're bound to find something that piques your interest in this list of distinguished nominees for the top food awards.




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The table-to-farm movement

Table-to-farm is the logical next step in the farm-to-table cycle.




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Are Americans getting greener?

A new survey reveals that overall, nearly 70 percent of U.S. consumers purchase green products or services.




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And the 2013 James Beard winners are …

Restaurants, chefs, and food writers received the highest honors in food during this past weekend’s James Beard Award ceremonies.




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IBM's Watson lands job at Memorial Sloan-Kettering

Watson will help doctors diagnose and treat cancer patients.



  • Sustainable Business Practices

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James Cameron created new camera system for trench dive

Director/explorer utilized new thumb-sized 1080p cameras to capture 3-D video from the deepest point on earth.



  • Gadgets & Electronics

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Apple defends decision to leave environmental program

Apple is defending its decision to have its products removed from the EPEAT environmental standards certification program. Speaking to The Loop, Apple spokesper




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Texas woman makes dumb choice to stop smart meter installation

Thelma Taormina isn't exactly keen on smart meters. So when a utility worker arrived at her Houston home to install one of the devices, she did what any totally




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NASA's experimental lander explodes in test flight

An experimental, "green" NASA lander crashed during its first free-flight test on Aug. 9, erupting in a ball of flame when it hit the ground.




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Ancient knots bind Mars rover's equipment together

While the Mars Curiosity rover sports state-of-the-art equipment, much of that machinery is bound to its body by a simple network of knots.




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Isn't it time we updated furnace standards?

Updated standards for furnaces and furnace fans, combined, could save consumers roughly $37 billion over three decades.




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Why 3-D food printing makes sense for nursing homes

When you can’t properly chew or shallow, eating can be a chore, but specialty created food can help.




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Just when you thought they couldn't re-invent the pillow, along comes NASA ...

How exactly does turning a pillow into a big fluffy gadget help us disconnect from the world?




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Hurricane Michele Bachmann? Viral video endorses name change

The tongue-in-cheek campaign, courtesy of 350.org, proposes naming storms after climate change deniers.




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Global warming? Some say Arctic is actually cooling

An article based upon a leaked report says that Arctic sea ice is up 60%. But is it true?



  • Climate & Weather

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Creating a mold resistant home

By taking steps to make your home mold resistant, you’ll avoid the headaches of remediation and repair, as well as the potential health problems mold can caus




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Mold and water damage remediation

Mold and water go hand-in-hand, so learn how to find mold and prevent it.




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How humidity can damage your home

Humidity doesn’t just make you uncomfortable. It also causes problems and health hazards at every level of the home. Here is a bottom-to-top summary of some o




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Got any tips on mold prevention when it comes to food?

Mold prevention is vital for healthy living, particularly when it comes to food. Keep the green fuzz off of your food by keeping the fridge clean and inspectin



  • Protection & Safety

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How to naturally humidify your home

To moisten the air in your abode, grab some plants, put out some dishes of water, and get cooking. Here are some alternatives to an electric humidifier.




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MNN Nest pledge: 'I will read three environmentally themed books this year'

Joining an environmental book club (or cracking a few eco-books solo) is a virtually effortless way to green up your life a bit.




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Gender-neutral baby names surge in popularity

The gender-neutral naming trend is spurred in part by parents who want to avoid assigning gender roles to their children at birth.



  • Babies & Pregnancy

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Americans push back on proposed fee increases at national parks

The U.S. Interior Department is reportedly backing away from the plan after receiving a flood of disapproving public comments.



  • Wilderness & Resources

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Dad has no idea he brought the wrong dog home from the groomer

His sons had to let him know that the strange new dog wasn't theirs.




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Instead of a message in a bottle, these Scottish boys launched a tiny pirate ship

Young Scottish brothers are watching to see where their little ship 'Adventure' will end up.




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Your earliest memories are probably lies

A major study finds a lot of people are clinging to memories that didn't actually happen.



  • Research & Innovations

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Creative ways we were called home for dinner

Do kids still get summoned back with bells and whistles at the end of playtime outside?



  • Fitness & Well-Being

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The real reason why eggs come in so many shapes and sizes may be childishly simple

A new study suggests the shape of an egg is determined by how much time a bird spends in flight.




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This couple cycled from Canada to New Mexico with their toddler

Last year, they successfully hiked the entire Appalachian Trail when their daughter was just a baby.