From the BBC:
Credited with founding science fiction as a field, Shelley’s key contribution to the genre was Frankenstein; or, The Modern Prometheus. She completed the novel in 1817, when she was still a teenager, after she and her lover, Percy Bysshe Shelley, were challenged to produce a ghost story by their friend Lord Byron. The book’s terrifying insight – that we could make life and intelligence – continues to be one of science fiction’s enduring themes.
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With 11 Hugo Awards and seven Nebula Awards to her name, Willis has won more major science fiction and fantasy awards than any other writer. Her work is witty, varied, and often satirical. From her breakthrough story Fire Watch, which was awarded her first Hugo and Nebula awards, her fiction has often explored the great science fiction trope of time travel.
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James Tiptree, Jr.
In spite of the name, Tiptree wasn’t a man. She was, in fact, a spy who worked for the CIA. Tiptree was the penname Alice Bradley Sheldon used exclusively for her science fiction work, which she debuted in 1968. Explosively influential at the time, her short stories changed the field and there is now a literary prize named in her honour.
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The first woman to win a Hugo, the first woman to win a Nebula, McCaffrey also enjoyed wide commercial success. The Ship Who Sang – a 1969 work encompassing five previously published stories – combined space and artificial personalities with utter originality.
Link to the rest at the BBC and thanks to Matthew for the tip.