Abstract
The pursuit of responsible nanotechnologies can be tackled through a series of grand challenges, argue Andrew D. Maynard and his co-authors. The spectre of possible harm — real or imagined — is threatening to slow the development of nanotechnology. In a Commentary this week a group of nanotechnologists outlines a series of five “grand challenges”. If they and their colleagues can rise to these challenges — which include development of new ways of measuring exposure to nanomaterials and assessing the health and environmental impact of that exposure — the true extent of any risks involved should become clear.
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