As of March 2012, this list is exclusive four items long, with the fourth being added on 26th March. The first three are these:
1. Trieste - 1960
2. KaikÅ - 1995
3. Nereus - 2009
What distinction, and who was in the fourth?
[+ Show Answer]
Reaching the "Challenger Deep" in the Mariana Trench, the deepest known point on Earth. James Cameron, the director, was in the Deepsea Challenger that made the latest descent.
This day last year: Q.188