This might appeal to the writers in the audience: Diamond Light Source is a particle accelerator facility in England, and they’re holding a fiction contest (including flash fiction) inspired by the facility and its science. They’re calling it Light Reading.
To introduce Diamond to a wider audience we are running a short story competition, Light Reading. The rules are simple: we’re inviting you to submit a story of up to 3,000 words inspired by Diamond – the facility, the science and the people. There’s also a Flash Fiction prize for stories under 300 words. Stories can be in any genre and there is no minimum word limit. Diamond will shortlist the best of these stories, which will then be judged by an expert panel. The top three writers will receive a cash prize, and these, along with those highly commended by the judges, will be published in an anthology of short stories.
Stories should be under 3000 words, and flash fiction stories under 300. As far as I can tell, it’s open to anyone from any country. There are cash prizes, and publication opportunities, plus you retain the rights to your story. Deadline is November 30th.