Characteristics of UFOs and Interdimensional Hypothesis

UFOs display various characteristics that proponents of the interdimensional hypothesis argue support the idea that they are non-physical entities from another dimension. These characteristics include not leaving physical artifacts even after crashing (although this is contradicted by many reports), generating no sonic booms or air resistance, being seen but not photographed (or vice versa), and changing resolution in photographs. Additionally, they may be detected by radar but not seen, or seen but not detected by radar. UFOs are reported to make sharp turns, sudden stops, and rapid accelerations, but advancements in aerospace technology make these maneuvers feasible. They are also said to hover without disturbing the air, change shape, size, and color, disappear and reappear, emit light that casts no shadows, leave no trace, melt material without fire, and cause physical harm to humans without any identifiable physical agent (though evidence for these claims is lacking). While these characteristics are cited as evidence for non-physical UFOs, alternative explanations exist for each of them.