Volunteers fighting polio in Pakistan are under attack as a result of a U.S. health program to track an al Qaeda leader.
To stop infected bodies from spreading the disease in Sierra Leone, health officials persuaded local leaders to change how villagers mourned.
How poverty, density, and fragmentation in Sierra Leone's capital city fueled the spread of the deadly Ebola virus.
Photojournalist Allison Shelley documented Haiti for a year after the 2010 quake. She went back this month to check on rebuilding progress.
Stumbling blocks to REDD+ in recent years have been many, with a significant one being reliable technology. That is no longer a problem.
Unilever CEO Paul Polmon is a corporate role model on climate change.
Noting that climate experts predict that 2014 will become the hottest year on record, Bianca Jagger warned: “Time is running out. Inaction will lead to severe and irreversible damage.”
On foot through the Holy Land.
As civil war rages in Sudan, an ancient but evolving tradition connects thousands of refugees to their life in the Nuba Mountains.
The uses of photography in drones: Has the medium itself become weaponized?
To put an accurate price on carbon, you need to know how much you have and where it’s located, researchers say.
One of the first travelers in a century to walk through the Hejaz desert of Saudi Arabia, Paul Salopek encounters a fabled past of caravans and pilgrims, of empires come and gone.