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Answering thorny questions about urban life

What Happens to the Coins People Toss Into Fountains?

There’s a lot of confusion about the secret life of submerged pennies.

Cyclists vs. Runners: A Path to Peace

Rules for sharing space in the park.

Ask CityLab: Can I Climb Urban Trees?

How to fulfill your leafy fantasies safely and legally.

How Much Loyalty Do I Owe My Local Shops?

Am I a traitor for ditching one mom-and-pop place for another one?

Ask CityLab: How Can I Keep My Dog With Me While I'm Running Errands?

Cities aren’t always the friendliest place for man’s best friend. But you can make it a little better.

Why Do Passengers Insist on Crowding Around Subway Doors?

And how can you get the bottleneckers to move?

Why Are Manholes Bursting Into Flames?

Yet another thing to blame on snow and ice.

How to Avoid Bringing Home Bedbugs

Expert exterminator tips for keeping the menaces at bay.

It’s Probably OK To Eat Fruit From City Trees

New research is good news for hungry urbanites.

Ask CityLab: What's the Deal with Steam Rising from the NYC Streets?

The plumes are so common, but also mysterious.

Ask CityLab: Why Won't Subway Doors Reopen When I Try to Squeeze Through?

Stand clear of the closing doors, please.

Ask CityLab: How Do I Get Rid of Head Lice?

They multiply like bunnies. The sooner you spot them, the better.

Ask CityLab: Why Do Sewer Systems Leak Noxious Waste in the Summer?

Caution: Dry heaving and a feces-filled river ahead.

Ask CityLab: How Do I Wage War on Rats?

An urban rodentologist explains how to defeat the sneaky vermin.

Ask CityLab: Why Does My Food Taste So Weird on Airplanes?

A new study suggests it’s all in your ears.

Ask CityLab: Can I Bike With My Baby?

Here’s how to safely take your little one for a spin.

Ask CityLab: Can I Grill on My Balcony?

Flame cooking in the open air should be so simple. And yet.

Ask CityLab: Why Can't I Recycle a Pizza Box?

The short answer: cheese grease is ruining everything.