John E. Hallsworth is a microbiologist who studies biophysical constraints on microbial systems from their cells to the level of biosphere, and the ways in which biology can circumvent these. He was born in Lancashire (England); graduated Plant Science from University of London (BSc. Hons, 1990); worked for a year in a pesticide research group (Dow Chemicals Inc., Oxfordshire), completed a PhD in Fungal Stress Metabolism at Cranfield University (1995); and held research positions in Edinburgh (Scotland), Japan and South Africa where he focused on elucidating stress mechanisms and responses in yeasts and fungi. During two further research positions, at University of Essex (England), he then focused on stress in bacterial and archaea systems, including halophilic species.
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