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Swimming, Feeding, and Inversion of Multicellular Choanoflagellate Sheets.
Phys Rev Lett
October 2023
Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom.
The recent discovery of the striking sheetlike multicellular choanoflagellate species Choanoeca flexa that dynamically interconverts between two hemispherical forms of opposite orientation raises fundamental questions in cell and evolutionary biology, as choanoflagellates are the closest living relatives of animals. It similarly motivates questions in fluid and solid mechanics concerning the differential swimming speeds in the two states and the mechanism of curvature inversion triggered by changes in the geometry of microvilli emanating from each cell. Here we develop fluid dynamical and mechanical models to address these observations and show that they capture the main features of the swimming, feeding, and inversion of C.
View Article and Find Full Text PDFNotes on growing love: Cherríe Moraga's "If," a world-making incantation conjuring collective consciousness through Chicana lesbian po(i)esis.
J Lesbian Stud
July 2023
Chicanx Studies, UC Davis, Davis, California, USA.
This essay introduces the embodied ceremonial practices of deep presence and sustained attentiveness as Chicana lesbian poetic devices that shape-shift Chicana lesbian subjectivities, socialities, and simultaneously the violence of colonial capitalist racial heteropatriarchies. My reading of the poem "If" in Carla Trujillo's rendering of Chicana lesbian desire in , delves into the shape-shifting and time-bending potentiation at the heart of Chicana lesbian poetics. Cherríe Moraga's "If" generously offers a map that stalls time with the magnificence of sustained attentiveness.
View Article and Find Full Text PDFColonial shapeshifting: Re-remembering medical education's burden on Indigenous peoples.
Med Educ
June 2023
Gukwonderuk Indigenous Unit-Faculty of Medicine Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia.
Despite increased attention in the health care field to the disparate health outcomes of Indigenous peoples, inequities persist. Analytical frameworks with the capacity to account for integrated systems analysis of power and domination are underrepresented yet vital to affecting change. Narratives represent Indigenous approaches to systems thinking, yet are often excluded from the literature on theorizing health systems.
View Article and Find Full Text PDFEvolution: Shape-Shifting Social Parasites.
Curr Biol
September 2020
School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA. Electronic address:
Ants exploit differences in body surface chemistry to distinguish nestmates from colony intruders. Socially parasitic ants in Madagascar have convergently evolved morphological similarities to host worker anatomy, implying that body shape may also be surveilled. Studies of tactile behaviors in ant societies are now needed.
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