In an early 1930s story in the Buck Rogers comic strip, Buck goes to Jupiter and befriends a tribe of giant wolves who live there. (Comic strip readers of the thirties must have been really good at suspending disbelief.)
The comic strip is interesting, if you’re a student of the early history of adventure comic strips or popular science fiction. If you’re looking for good art, intriguing plots, or engaging characters, you may be disappointed.
Nevertheless, here’s a pretty decent description of courage:
He isn’t afraid to do things he’s afraid to do!
It’s not courage if you’re not afraid.