Only Two Men12 men have walked on the lunar surface. But only two have descended to the ocean’s deepest point. Shown here are Don Walsh and Jacques Piccard on their January 23, 1960 mission to the bottom of the Marianas Trench in the western Pacific. The temperature outside sat at freezing. The light was lost at around 500 feet, some seven miles above them and the pressure on the capsule in which there were riding was 354 million pounds. They exceeded the capability by more than 12 times the rated max depth of the most advanced 21st century military submarine.