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The most compelling and popular models for dark matter predict that it shouldcongregate and annihilate in stellar cores. Stars where annihilationcontributes substantially to the total energy budget look very different tothose with which we are familiar. Here I explain the general features of starsmodified by dark matter annihilation with the help of a series of grids of'dark' stellar evolutionary models, and describe the public code with whichthey were computed. I go on to discuss possible impacts of dark stars on thehigh-redshift Universe, including the history of reionisation. The preliminaryreionisation calculations reproduced here are based on dedicated models fordark star atmospheres, and for the stellar populations to which dark starswould belong.

Dark stars: structure, evolution and impacts upon the high-redshift Universe