Stan Lee got the idea for Groot from this movie.
Professional wrestler turned stuntman/actor Chester Hayes played Prince Maku. It is also Hayes who is inside the Tabanga costume.
Inspired one of the most infamous movie reviews of all time: "And to hell it can go!"
The periodic table in the lab is dated 1947 and only shows 96 elements.
The iconic Tabonga monster was designed by Paul Blaisdell, also known for his work on The She-Creature, Invasion of the Saucer Men, Not of This Earth and It! The Terror from Beyond Space, but was manufactured by Don Post Studios.