I didn't make it up, so it's not my fault. This article is rambling and not really the best but it will at least prove that the genre exists haha. "Science fantasy is a mixed genre within speculative fiction drawing elements from both science fiction and fantasy. A definition, offered by Rod Serling, is that "science fiction makes the implausible possible, while science fantasy makes the impossible plausible."
Be happy, my friend; and if you obey me in this one request, remain satisfied that nothing on earth will have the power to interrupt my tranquility. — Mary Shelley, Frankenstein