Eastern State Penitentiary housed its last inmates in 1971. Since then, it's become a destination for visitors, art, and prison-era reunions.
New York and Philadelphia top the list of urban areas with great gaps in pollution exposure between whites and non-whites.
Using 1,400 LED lights.
Walkable suburbs and center city companies are dominating the tech scene.
A Philadelphia art installation is rethinking that insipid old Muzak.
How U.S. cities stack up economically worldwide.
A GIF to remember the endless snow of 2014.
New research finds that businesses loathe bad traffic at the regional level, but benefit from it locally.
Street grids of necessity.
"What cops do is arrest people. If you don’t want to be arrested, you probably shouldn’t call the police."
New York in 1776, Charleston in 1780, Baltimore in 1801.
Phoenix says it has among veterans. Next it's aiming for the broader homeless population.
At last, historians have charted the great "squirrel experiments" of the 1800s, which saved the humble creature from urban extinction.
Median incomes have been growing the fastest, however, in a very different part of the country.
Los Angeles is the latest city to consider a ban on providing meals to the homeless in public.
And other eye-popping comparisons.
Major urban areas are magnets for the uninsured, and the state politicians who turned down the Medicaid expansion are not the ones who will pay to treat them.
The "stop snitching" movement meets social media.