They may be the size of a Shetland pony and weigh up to 275kg (600lb) but pigmy hippos are very hard to spot in the wild. In ...

Twenty-four years ago, Dr. Annika Hillers set out as a researcher in West Africa while pursuing her PhD in biology at the Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam.

In the streets of Anyama, children play and braziers smoke on corners. There is little to show that the ground of this everyday Ivory Coast neighborhood conceals seminal prehistoric treasures. Near ...