I’m not sure why you’d need or want a randomised controlled trial to determine the colour of the sky. There have been empirical studies done to determine the co

I’m not sure why you’d need or want a randomised controlled trial to determine the colour of the sky. There have been empirical studies done to determine the colour and the reasoning for it - https://acp.copernicus.org/articles/23/14829/2023/acp-23-14829-2023.pdf https://acp.copernicus.org/articles/23/14829/2023/acp-23-148... is an interesting read.