It would likely have been true a few years ago, but now 27 people have been to the Challenger Deep: https://en.wikipedia.org/wiki/List_of_people_who_descended_t

It would likely have been true a few years ago, but now 27 people have been to the Challenger Deep: https://en.wikipedia.org/wiki/List_of_people_who_descended_to_Challenger_Deep https://en.wikipedia.org/wiki/List_of_people_who_descended_t... That's more than the 12 who have walked on the moon.