地球空洞説 (chikyū kūdō setsu)

The song "地球空洞説 (chikyū kūdō setsu)" by フレネシ delves into the intriguing and often fantastical theory of a hollow Earth. The lyrics explore the idea that if one could inflate the Earth until it bursts, they might be able to see its inner workings. However, the song quickly points out that the hollow Earth theory is far from simple. The mention of satellite photos supposedly revealing entrances at the poles, only to be debunked as tricks of composite images, highlights the theme of deception and the human tendency to be misled by seemingly convincing evidence.

The song references historical figures and their contributions to the hollow Earth theory, such as Captain Sims, who is noted for seeing something different in a place where something else should have been. Despite his contributions, Sims is portrayed as a forgotten figure, emphasizing the transient nature of fame and recognition in the scientific community. The lyrics also mention the experiences of the Jansen family and the enigmatic ending of their story, further adding to the sense of mystery and the unknown.

Edmond Halley's scientific inquiries and his eventual disregard by the academic community are also touched upon, symbolizing how groundbreaking ideas can be buried under the sands of time and skepticism. The song encapsulates a sense of wonder and curiosity about the unknown, while also critiquing the ease with which misinformation can spread and the difficulty of maintaining scientific integrity in the face of popular myths. Through its poetic and metaphorical language, "地球空洞説 (chikyū kūdō setsu)" invites listeners to question what they know and to remain open to the mysteries that lie beneath the surface of accepted knowledge.