By Alvina Siddiqui —
When she was 16, Marilyn Bell was not only the first girl, but the first person ever, to make it across Lake Ontario, swimming for almost 21 hours over a 32-kilometre stretch.
Siddiqui, a fourth-year student, wrote this article while on her six-week internship with Canadian Geographic. Follow her on Twitter @alvinas_jrn.
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