Speculative fiction has changed a lot. It's become more diverse in themes and styles. There are now more complex characters and deeper explorations of social and scientific issues.
Speculative fiction has evolved greatly. It's moved away from simple adventure stories to tackle complex philosophical and ethical questions. Also, the writing styles have become more sophisticated, and the boundaries between different subgenres have blurred.
Well, over time, speculative fiction has expanded its reach. It's not just about space and time travel anymore. It now incorporates elements like artificial intelligence, climate change, and genetic engineering, making it more relevant to our modern world.