Fifty percent of the United States of America is underneath the ocean. And we have better maps of Mars than those areas.

I can't travel without Sudoku.

It is a quiet and peaceful place - and a fitting place for the remains of this greatest of sea tragedies to rest.

You don't go to Gettysburg with a shovel, you don't take belt buckles off the Arizona.

Almost a quarter of our planet is a single mountain range and we didn't enter it until after Neil Armstrong and Buzz Aldrin went to the moon. So we went to the moon, played golf up there, before we went to the largest feature on our own planet.

I am an underwater explorer, not a treasure hunter.

I mean, there is amazing amount of oil and gas and other resources out beneath the sea. It's staggering.