Two years ago, baby boomers Ann Bancroft, 48, and Liv Arnesen, 50, became the first women to cross Antarctica by foot--trekking 1,700 miles in nearly three months in temperatures as cold as -35ºF. The duo write about their experience in No Horizon Is So Far. TIME spoke with Bancroft:
When did you first get interested in this kind of activity?
From the get-go, at 8. [I have] really solid memories of the idea of going to these faraway places, these polar regions. That was exciting from a very early age.
Do you consider yourself an athlete or an explorer?
A...