Some birds that live year round in big cities have eyes that are about 5% smaller. Researchers say bright lights may be the cause.

Interviews with unhoused people who've recently experienced opioid overdose indicate ways to approach places like "Mass and Cass" in Boston.

The urban heat island effect can lead to dangerous temperatures during the summer. But trees—and higher buildings—can lessen the effect.

Community gardens and urban farms are good for biodiversity and ecosystems. They also benefit the well-being of people that work in them.

"Our study provides strong evidence that daily temperature plays a meaningful role in gun violence fluctuations."

"Understanding how animals adapt to urban environments can help us focus our conservation efforts on the species that need it the most..."

Botanical gardens and other urban green spaces can hold surprising diversity, according to a new study that shows they're key for butterflies.

Exposure to green space in virtual reality has health benefits for pregnant urban women, including lower blood pressure.

Ants go through both physiological and behavioral changes to adjust to unnatural settings like urban sprawl, a new study shows.

"The mental health burden of America's largest public-works environmental disaster clearly continues for many adults in Flint," says Aaron Reuben.