For example: - https://gist.github.com/benmarwick/5cfeda1d20ff9ab3231a5de8fac36213 - https://www.geeksforgeeks.org/how-to-use-superscript-with-ggplot2-in-r/ - https://stackoverflow.com/questions/63010394/superscript-in-axis-labels-in-ggplot2-for-ions
