The discussion centers on seeking datasets for rotational and apparent mass of galaxies to explore an alternative explanation for dark matter. The original poster, an engineer with limited background in cosmology, expresses a desire for multiple data sources and mentions the SPARC database as a potential resource. Forum members advise starting with foundational texts and understanding established cosmological theories before attempting to propose new ideas. They emphasize the complexity of cosmology and the extensive research already conducted in the field, suggesting that significant expertise is necessary to contribute meaningfully. The thread ultimately highlights the challenges of entering advanced scientific discussions without a solid grounding in the subject matter.