An Invitation to the MolecularIt was caught by the wind, fl ung down on the earth, lifted ten kilometres high. It was breathed in by a falcon, descending into its precipitous lungs, but did not penetrate its rich blood and was expelled. It dissolved three times in the water of the sea, once in the water of a cascading torrent, and again was expelled. It travelled with the wind for eight years: now high, now low, on the sea and among the clouds, over forests, deserts, and limitless expanses of ice; then it stumbled into capture and the organic adventure. (Levi 1985 : 226) You are sitting in an overly air conditioned room at a geography conference. The chairs are uncomfortable and the lack of natural light tiring, but the talks are topical and important. They encompass a selection of contemporary social geography concerns, touching upon questions of identity and community, of inequality and justice, and of the production and experience of bodily difference. One presentation explores the viral socialities in the unfolding swine fl u pandemic: the exclusionary spatial practices of biosecurity, involving school closures and quarantines, alongside the cultivation of new forms of association in the form of fl u buddies and interspecies suffering. Another addresses the changing experience of corporeal difference through genetic counseling offered to populations at risk of inherited chromosomal alterations: making visible those individuals with affected recessive genes, at the same time as offering a space, through pre -implantation genetic diagnosis, to decide not to extend this particular community. A third traces the fate of human oocytes on the move: the technological processes which enable this vital entity to transfer from one body to another, and the transactional values -this much for this egg, that much for another -which remind us that not all bodies are marked the same. These