The Hollow Moon hypothesis proposes that Earth's Moon is either wholly hollow or otherwise contains a substantial interior space. No scientific evidence exists to support the idea; seismic observations and other data collected since spacecraft began to orbit or land on the Moon indicate that it has a thin crust, extensive mantle and small, dense core, although overall it is much less dense than Earth.
The Hollow Moon concept is similar to the better-known Hollow Earth hypothesis, and was a recurring plot device in pre-spaceflight science fiction.
Hollow Moon adherents can be broadly grouped in two major camps, neither of which is considered by the scientific community to be supported by evidence:
"Hollow Moon (Bad Wolf)" is a song by American electronic rock band Awolnation. It was released as the lead single from their second studio album Run (2015). The song became their first number-one hit on the Billboard Alternative Songs chart in early 2015.
The video for "Hollow Moon (Bad Wolf)" was shot in one take by director Hayley Young in Seattle, WA. It was uploaded to the Red Bull Records' YouTube page on January 26, 2015. The video starts showing few actors and then the camera locks on frontman Aaron Bruno, it becomes focused on him throughout the video, capturing his movements, and correlation of facial expressions in regards to the lyrics. Bruno then walks into a sea of people, as the electro rock element implements several scenes, and he is seen dancing casually as he continues to walk and sing.