<human>:  When did the first wheelchair appear in science fiction?
<bot>: The first wheelchair in science fiction was in the book Starship Troopers, by Robert A. Heinlein. The main character, Johnny Rico, is a soldier in the army and is injured during a battle. His leg is crushed, and he has to use a wheelchair to get around. The book was written in 1959, so it predates the invention of the wheelchair by about a decade.