Our new monthly guide to conferences taking place around the world.

EWC4UK : fourth European Mars society conference, Open University, Milton Keynes, 8-10.

Communicate : an international conference on conservation and communication, organised by the Bristol Natural History Consortium, Bristol, 7-9.

National Obesity Forum Conference : "Obesity - The History of Fat - The Future of Lean", London, 13-14, includes sessions on childhood obesity, its psychological effects, remedies and government policies.

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Sporting Future : organised by the Institute of Sport and Recreation Management, English Institute of Sport, Sheffield, 14-16.

The Nuclear Science Symposium : medical imaging conference, symposium on nuclear power systems and 14th international workshop on room temperature semiconductor X- and gamma-ray detectors, organised by the Institute of Electrical and Electronics Engineers, Rome, 16-22.

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The Nature of Mathematical Proof : discussion meeting, organised by Alan Bundy, Donald MacKenzie, Sir Michael Atiyah, the Royal Society,18-19.

GeoFakes, Frauds and Hoaxes : series of talks on geological fakes to celebrate the tenth anniversary of the History of Geology Group, organised by the Geological Society, Burlington House, London, 22.

DNA and the Middle Ages : conference for geneticists, historians, archaeologists and others on how DNA can help reinterpret the way our ancestors lived, organised by Scott Ashley, Newcastle University, 22 Languages of Emotion: multidisciplinary colloquium organised by the School of Advanced Study, supported by the British Academy, Institute of English Studies, University of London, 22-23 Neuroscience 2004: the Society for Neuroscience's 34th annual meeting, San Diego, 23-.

Seventh International Conference on Urban History : European City in Comparative Perspective, organised by the European Association of Urban Historians, Athens-Piraeus, Greece, -30, examines aspects of city living including sanitation, green spaces and beggars.

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