In retrospect, I would like to share that letter once again as a cautionary tale about the perils of impulsively asserting what’s good or bad English. My instructress in Earth and Environmental Science publicly confronted me because I corrected her grammatical mistake on her examination paper. Recall the general rule for establishing relationships in space: use “in” for an enclosed space, “on” for a surface, and “at” for a point (http://tinyurl.com/clvn9tw). For the word “planet” though, this question arises: Isn’t it a surface rather than an enclosed space? Grammatically, this warrants the use of “in” for establishing the position of a volcano and all other objects within this enclosed space.

Source: Manila Times August 05, 2020 17:40 UTC