Obscure scientific theories are ideas that are not widely accepted or understood within the scientific community. These theories often arise from unconventional interpretations of data or phenomena that challenge established scientific norms. For example, the Hollow Earth theory suggests that the Earth is entirely hollow or contains substantial interior space, a concept that contradicts current geological understanding. Another example is the Electric Universe theory, which posits that electromagnetic forces, rather than gravity, play a significant role in the universe's structure and behavior. This theory challenges traditional astrophysics and has gained a small following, despite lacking substantial empirical support.