Block: Superscripts and Subscripts

Range U+2070 - U+209F
Official Chart http://www.unicode.org/charts/PDF/U2070.pdf
Wikipedia A subscript or superscript is a character (number, letter or symbol) that is (respectively) set slightly below or above the normal line of type. It is usually smaller than the rest of the text. Subscripts appear at or below the baseline, while superscripts are above.
https://en.wikipedia.org/wiki/Superscripts_and_Subscripts
Characters