National Geographic photographer Keith Ladzinski focused on the positive when it came to forest fires: the solutions people are working on.

From cardiovascular disease and obesity to a weakened immune system, the side effects of stress can be life-altering. But there may be a way to prevent those outcomes. This questionnaire—first ...

For centuries, the Seine River has been Paris’s dumping ground. A billion-dollar cleanup is trying to make it swimmable again. The history of Paris is inextricably linked to the river that flows ...