John Metcalfe

A 'Pedal-Powered Popemobile' for Pope Francis

There's "no excuse for the big man to always roll in an SUV," says the inventor of this eco-friendly holy tricycle.

The Nuclear Option for Rude Subway Riders: Wearable Speakers

It's about 100 times worse than listening to music without headphones.

Minneapolis Bike Riders Targeted With Sticks, Rocks, Molotov Cocktail

The Midtown Greenway has been the site of many high-profile attacks on cyclists.

Will Somebody Please Make This Old-School Graffiti Video Game?

Real-life graffiti artists star in this fake 32-bit arcade game taking place in cities across North America.

For Cleveland, Climate Change Could Mean Tons of Toxic Green Algae

Heavy agriculture and global warming are aligning to produce nasty algae blooms in the Great Lakes, scientists says.

Does Giving Out High Fives Make Riding the Subway Fun?

Probably not, but that didn't stop one artist in Milan from standing outside the station slapping skin all day.

Don't Worry, the Spanish Are Already Protesting the 2020 Olympics

Artists in Madrid railed against the "destruction" of the Games with artwork made from what looks like Molotov cocktails.

App Developers Turn Their Eye to Global Sanitation

Participants of the "International Sanitation Hackathon" have some promising ideas to fight disease and death caused by poor sanitation.

An Awful Person Destroyed Golden Gate Park's 'Fairy Door'

San Francisco just got a little less whimsical.

The Addictiveness of the U.S. Census Bracket Game Cannot Be Denied

Sixty-four cities, 64 populations to rank by size.

The Surprisingly Gentle Science Behind New York's Plan to Sterilize Its Rats

Hitting urban rodents in their reproductive systems may be the best thing to ever happen to them.

Here's a Bicycle You Assemble From Big Sheets of Plywood

This award-winning Dutch bike snaps together like one of those plastic airplane models that kids make.

Are London's Public Buses the New Prozac?

Taking the bus makes people feel more social and less lonely, researchers say.

The Wu-Tang Clan Might Appreciate These Hip-Hop Street Signs

Rappers like to call out street names; New York artist Jay Shells likes to put their lyrics up at the actual intersections they mention.

The Urban Heat Island Could Be Attracting Bugs

The hotter neighborhoods of Raleigh are awash in scale insects, an ominous indicator of how bug populations might swell in a globally warmer world.

Another Giant Sinkhole Appears in China, Swallows One Person

This latest gaping chasm is said to measure four-stories deep.

Watch: A Dance Performed With a Pedaling Park Bench

A modern dance from San Francisco.

New Sport: Hanging By One Arm From Awfully High Places

This Ukranian urban climber is either extremely skilled or deranged (or perhaps both).

In Arizona, Fear of a Transgender Toilet

Arizona wants to tie bathroom access to birth certificates; scientists sound warning about pit latrines; a municipal government does BYO toilet paper.