Some of the best world-building in comics, and a lot of sly references to 80's cartoons, most of the lost civilisations and ancient astronaut stuff they find are expies of Rainbow Brite, He-Man, Centurions, My Little Pony, etc.
Just be prepared for a mixture of confused silence and abuse whenever you bring it up, as it crosses the streams between western and manga, the same sin as Empowered and Spinnerette, PLUS it got branded as "Furry" in the 90's and never kicked the stigma.