Blue Hole

Manga · 1991

Sci-Fi

Blue Hole is a Japanese manga series written and illustrated by Yukinobu Hoshino. It was serialized in Kodansha's seinen manga magazine Mr. Magazine from May 1991 to November 1992, with its chapters collected in two tankōbon volumes. The story is about the discovery of a gateway in time and space deep underwater which allows for travel between the present day and the age of the dinosaurs.