The United Nations world conference on small arms has collapsed without agreement — despite the majority of governments, including the European Union and many African and Latin…

The semi-arid Sahel stretches across Africa just south of the Sahara. The region suffered severe drought during the second half of the 20th century, but there is disagreement…

A powerful international consortium set up to accelerate research into a vaccine against HIV/Aids has identified major barriers to the first generation of commercially available…

In the long-term, nanotechnology — or the technology of very small particles — could generate big benefits for global society, such as cheap sustainable energy and better methods…