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How the Danish Cooperated to Build a Bicycle Superhighway

Getting the 22 municipalities involved to agree was not easy, but the outcome is revolutionary.

Uber's Other Price War Is in India, Where Rides Now Start at $1.30

Uber just cut its rates in one of the world's cheapest transportation markets.

In Canada, DIY Wheelchair Ramps Are an Imperfect Fix

As Ontario businesses move toward mandated accessibility compliance, ramp project StopGap doesn't want perfection to be the enemy of good.

So You've Decided to Map Sidewalk Poop in San Francisco...

Sorry to say you'll discover that much of it is attributed to humans.

The Ideas That Led Calgary to Choose a 'Wonkish, Dorky' Mayor

Naheed Nenshi talks urban development, affordable housing, and how national governments fail cities.

Is the Sun Causing Spikes in Lightning?

Scientists say the star's magnetic field may be ratcheting up strikes by 50 percent.

It's Not Easy Being Green Czar

Matt Petersen is L.A.'s first chief sustainability officer, charged with drafting an ambitious plan for a city grappling with drought.

Paris May Not Welcome the 'Human Zoo'

A white South African artist's re-creation of a colonialist tradition exhibiting "exotic" people is drawing ire across Europe.

A What's-Next Moment for San Francisco's Housing Crisis

As in, what happens if there is no near-term solution to San Francisco's housing crisis?

Daily Photos of a Single Skyscraper Show the Reality of Beijing's Toxic Smog

This man uploaded one photo every day. The results are startling.

Sorry Photo Drones, These Real Bird's-Eye City Views Rule Way Harder

To mark the 50th anniversary of the "Red List" of endangered species, a white-tailed eagle with a GoPro captured swooping views of London.

Choose One, Millennials: Upward Mobility or Affordable Housing

The paradox of the American Dream: The best cities to get ahead are often the most expensive places to live, and the most affordable places to live can be the worst cities to get ahead.

Why an Ambitious, Fanciful 'Linear City' Failed

A Le Corbusier-inspired idea for a city that organized transit and architecture around "functional delineation" was never realized.

Prague's 'John Lennon Wall' Gets an Apolitical Makeover

The famous landmark has been a protest-art site for decades. Now, Praguers are divided on whether "Wall is Over."

To Kiss or Not to Kiss in Indian Cities

Why young people are taking to the streets just to smooch in public.

Silicon Valley Could Offer a Public Bus Commute That's Quicker Than Driving

The El Camino BRT project shows why great transit needs exclusive lanes.

Acid Rain Has Turned Canadian Lakes into a Kind of Jelly

A legacy of industrial pollution is allowing slimy ooze to thrive.

Japan Now Has a Traffic Signal Shaped Like Astro Boy

But can it aerate jaywalkers with retractable butt guns?

Why You Keep Seeing Plans for Off-Shore Parks

Building over-water park infrastructure is one approach for dense cities. But are these parks a flashy design fad or a real urban solution?