Photo of the Day

Picture of a green roof in New York City at night
January 28, 2022

Green Roof

A story in the May 2009 issue documented the worldwide phenomenon of green roofs, demonstrated here by a roof in New York City. Green roofs absorb rainfall, reduce runoff, and lower summer temperatures on the roof.
Photograph by Diane Cook and Len Jenshel, Nat Geo Image Collection

Go Further

Subscriber Exclusive Content

See how NASA’s new Mars rover will explore the red planet

Why are people so dang obsessed with Mars?

How viruses shape our world

The era of greyhound racing in the U.S. is coming to an end

See how people have imagined life on Mars through history