The Segway wasn't always just the transportation of choice for out-of-shape mall cops and tourists who can't be bothered to walk from the Washington Monument to the Lincoln Memorial. When it was introduced, the idea was that it would render cars obsolete, making "walking" so quick and effortless that urban planners would be forced to start building cities at human scale.

Instead, a decade later, we're asking "hey, is there any way we could have a similar technology, but even lazier?" Honda has your answer. Its Uni-Cub is battery-powered and balance-controlled like a Segway, but instead of steering by shifting weight from foot to foot, you sit down and steer by shifting weight from cheek to cheek. Phew! All that standing still was getting really exhausting.

Last week, I wrote about my quest to buy a new car. We're sick of our minivan/land yacht and want something smaller and more fuel-efficient that will nonetheless fit our whole family (and our dog) for our daily city commute.

I received all sorts of helpful advice/tips/info in the comments on that post. It made me appreciate anew the great community we have here at Grist.

After so many years of doing this, I've even come to appreciate the more ... enthusiastic feedback. I learned that I should get a new wife because mine complains too much, that I should get rid of my dog, or leave the dog at home, that I should stop being a cosseted hypocrite and start getting my kids to school and doing my errands by bus or bike, and that above all, I should never, ever say anything nice about cars generally or any car specifically and that by doing so I have disgraced myself, disgraced Grist, and most likely disgraced the baby Jesus.

Photo by Dithyrambalina.com.

The Music Box is a New Orleans art installation that makes regular artist's colonies look like Camazotz. In this tiny shantytown, every building is also a musical instrument, and the entire town can be played in a beautiful, spooky symphony that looks and sounds like something out of Coraline.

Trying to get some work done? Banish the thought. It's National Bike Month, it's spring, and these lovely people obviously need company.

The folks who brought you Walk Score, an online tool that ranks neighborhoods based on whether you can get anywhere on foot, are expanding to appeal to the biking crowd. This tool is a little more limited (only 10 cities have been scored) but it's also more in-depth: Walk Score will assume you can stroll to the grocery store down the shoulder of a four-lane road, but Bike Score also covers bike path availability, terrain, and how many people will be joining you on your two-wheeled commute.

This video is probably what Ralph Steadman sees when he takes half a tab of acid and looks at a map of Budapest, but it's also a data visualization of the city's bike usage during a 24-hour period. The size, location, and direction of the bubbles reflect how many people are on bikes at a given time, and where they're going.

Living the dream in Copenhagen. (Photo by Mikael Colville Andersen.)

Once was that American cities competed to look more like Detroit, with gleaming lanes of highway stretching as far as the eye could see. Any more, it’s a race to imitate Copenhagen, the Danish capital where 36 percent of residents commute to work via bicycle.

So it seems, at least, when looking at today’s announcement by the League of American Bicyclists of the latest -- and largest -- round of official Bicycle Friendly Communities in the U.S. Some of the cities on the list will come as no surprise: Portland, San Francisco, and Chicago are here, as is Missoula, Mont., where 7 percent of residents bike to work, versus the 0.6 percent national average. But so are cities like Baltimore, Cincinnati, and Cottonwood, Ariz. Twenty-five more cities applied for bicycle-friendly status, but were denied.

The league hands down its Bicycle Friendly certification with a multi-tier, Olympics-like grading system: Cities can earn bronze, silver, gold, and platinum. The awards, which have been around since 1996, recognize cities that both promote cycling as a means of transportation and actively work to make cycling safer. A panel of national experts brought in by the league and local enthusiasts (bike shop owners, advocacy group leaders) assesses applications along five main criteria: engineering, education, encouragement, evaluation and planning, and enforcement.

The best cities, League of American Bicyclists President Andy Clarke says, have action plans in place to ensure that residents have opportunities to ride. They have city-sponsored bike rides, and networks of bike trails, lanes, and sharrows that connect them to where they need to go.

This house is extremely efficient.

Wouldn't it be cool if we passed a rule mandating that all new federal buildings had to be carbon-neutral by 2030? The feds buy and build a lot of real estate. An effort to wring fossil-fuel energy out of those buildings -- by increasing their efficiency and supplying them with renewables -- would seriously bolster domestic markets for efficiency and distributed energy. Beyond that, it would serve as a proving ground and an example for the communities where those buildings are located. It would be galvanizing.

"But," you're protesting, "we would never do something so radical. Germany might. Denmark, maybe. Not us."

Hark! I say to you. Hark to this sh*t: We do have such a rule!

As you may have heard, President Obama is being cagey about whether he'll attend the Earth Summit in Rio next month. You know, it's just the FUTURE OF THE PLANET that’s up for discussion. Nothing big. Maybe he’ll go. Maybe not.

As it happens, we were in the same situation 20 years ago, as the 1992 Earth Summit approached and George Bush Sr. was giving it the old, "Well, maaaaaybe ..."

Back then, a group of the major, mainstream environmental groups in the U.S. rallied for the cause. To convince Bush he should attend, they enlisted none other than Darth Vader. Well, his voice, at least -- the actor James Earl Jones. They made the spooky film clip below, replete with -- is that the Pony Express or the Horsemen of the Apocalypse? -- and then ran it in movie theaters around the country. Jones did the voiceover. Need I even tell you that Bush Sr. decided to attend?

In my research into the 2012 Earth Summit, I’ve noticed very little action from the major U.S. greens. A handful of them, including EarthJustice, the Natural Resources Defense Council (NRDC), the Nature Conservancy, and the Pew Environment Group, have been involved, along with groups focused on clean energy, sustainable agriculture, and other issues, but where’s the old guard that sponsored the Darth Vader ad two decades ago? I decided to do a little poking around.

The Copenhagen Philharmonic really knows how to make a subway commute more beautiful. Musicians took over a train car during what looks like the morning rush hour, and gave riders a surprise performance of "Morning Mood" from the Peer Gynt suite (aka the music that plays any time a cartoon shows a sunrise).