Researchers have noted that the intense red color of the Nile River is due to a variety of factors, including mineral dyes, sediment, and microorganisms. Some claim that this phenomenon is a result of toxic algae or a high concentration of dissolved iron, but experts have refuted these claims as baseless and emotionally charged. Additionally, there have been historical instances of the Nile turning red, but these were likely caused by natural factors such as silt and vegetation.