%T Introduction: Excavating and (re)creating the biosocial; birth cohorts as ethnographic object of inquiry and site of intervention %A S Gibbon %A M Pentecost %I Somatosphere %L discovery10110621 %D 2019 %O This is an Open Access publication published under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) Licence (https://creativecommons.org/licenses/by-nc-sa/3.0/).