A combination of reasons have led to the drying of the Sahel.
Two trends in Australia, an ageing population and warming climate, are increasing the threat that heatwaves pose to our health. Increasing vegetation cover is one way every city can reduce the risk.
Revealed: spotted hyaena are actually excellent hunters in their own right.
Drone technology plays a vital role in gathering accurate wildlife data. But this alone isn't enough to save Africa's elephants.
Kumbh Mela is the world's largest congregation of people – so large, it's visible from space. However, river pollution is a major issue here and new solutions are needed.
A few decades ago Boston Harbor was one of the nation's dirtiest water bodies. Now, healthier fish in the harbor underscore that a multibillion-dollar cleanup has succeeded.
Antarctic sea ice cover fell to an all-time low recently and hasn't yet recovered. Why? The initial answers could lie in an unlikely place – the tropics.
Plans to dam Lake Baikal's most important tributary could kick off an international dispute.
Farmers should use biopesticides - naturally occurring substances that kill pests such as the fall armyworm - instead of using pesticides, which are often highly toxic.
Human conflict can bring isolation to environments, which helps the local ecology thrive. After the war has ended, the return of nature is a poignant memorial and symbol of peace.