My original tumblr post was here. This cover of Science Stories (October 1953) is the work of illustrator Hannes Bok (1914-1964). It illustrates Jack Williamson’s story “Hocus Pocus Universe.” It was first posted by Raiders of the Lost Tumblr and comes to us via doppelgaenger18.

A gallery of Hannes Bok’s work can be found at the American Art Archives.