Yes, Mark Twain did write some works that could be considered to have elements of science fiction. For example, 'A Connecticut Yankee in King Arthur's Court' has elements like time - travel which is a common theme in science fiction. David Ketterer might have studied and analyzed these aspects of Twain's works in relation to science fiction.
Sure. Mark Twain was a very versatile writer. His work 'A Connecticut Yankee in King Arthur's Court' contains science - fiction elements. The main character travels back in time to King Arthur's era. This idea of time - travel is a significant aspect of science fiction. David Ketterer might have looked at how Twain incorporated this science - fiction concept into his narrative. He could have also studied how Twain's work influenced later science - fiction writers. Twain's unique writing style and his use of this science - fiction trope made his work stand out. It was not just about the science - fiction aspect but also how he used it to tell a story about human nature, society, and the clash of different cultures and time periods.