Cymene and Dominic talk true crime and Pruitt crime on this week’s podcast before (13:59) welcoming the fabulous Liz Roberts from the University of Michigan to the conversation. Our offspeed start features the legend of Mick Taussig’s formica table before Liz tells us how she became interested in building bridges between anthropology and epigenetic science and found her way to the ELEMENT study, which has been investigating the impact of chemical exposure upon Mexican children since the 1990s. We talk genes, bodies and environments and Liz links deterministic models of the gene to infrastructures of impermeability that flourished (for some) during the mid 20thcentury. Turning to her fieldwork in Mexico City, Liz shares what she learned about how borders matter and why she is cautious to embrace “entanglement” as an analytical norm. We talk about white middle class anxieties about exposure and permeability and how they compare with sentiments in Mexico. This leads us to her recent work on water and trust and how Coca Cola made people in Mexico City not trust the tap water. And that gets us to soda and its relationship to class and care. Finally we turn to Liz’s latest project, “Mexican Exposures” (mexicanexposures.com) and her interdisciplinary approach to collaborative bioethnography.