Here is a great magazine that is looking for flash fiction inspired by science!
[Antimatter Magazine is] most interested in flash fiction, but we’re also open to story experiments, narrative games, and text messager-based stories.
First, find a recent scientific story, headline, or discovery that sparks your imagination. (View science headlines here. View scientific story prompts here.)
Then, use that real science headline to inform, drive, or inspire an original flash science fiction story.
It’s not required, but preference is given to stories crafted to feel real – like they really happened.
Such stories can include many links to sources, authoritative quotes, and other techniques that lead the reader to suspend disbelief.
They pay $20 USD/story, and you need to include a reference to the scientific piece that inspired you. Get submitting!
Listing here: https://literarium.net/market/antimatter/antimatter