Do we know enough about all crops of the world before we step into teasing evolution within the pool of a tiny number of species? Not well discussed and not well understood, an important tropical crop in Africa and other parts of the world reports: "Yam not a grain, yet I feed 60 million people every day. Yam a productive and valuable crop for farmers, getting as large as 2.5 meters long and weigh up to 70 kilograms. However, you know so little about how much I can give". Read the full story about the efforts of the Global Crop Diversity Trust (GCDT) for saving endangered yams in this month's Scientific American.

Michael Kreuzer, Professor for Animal Nutrition at the ETH Zurich and Vice-President of the North-South Centre, delivered the opening speech “About the World Food System” of this year's Tropentag. Being held for the first time outside Germany, the Tropentag just beat the records: There are 1.228 registrations from a total of 83 countries, more than 1.100 abstracts were submitted, of which 522 were accepted for presentation, and there will be 130 oral presentations and almost 400 poster presentations. Thus, it promises to be a very diverse, multi-faceted and interesting conference! The World Food System is a major area of research of the North South Centre of the ETH Zurich. Founded in 2007 from its predecessor, the Centre of International Agriculture (ZIL), the North South Centre brings together various academic disciplines, ranging from agricultural sciences and information technology, to environmental studies and social sciences, thus offering an interdisciplinary approach for analyzing the World Food System.