Brother of James Cameron, Michael (right) engineered and manufactured the ROVs at his company Dark Matter, LLC, located in Valencia, California. Like his brother, there’s little Mike can’t do or hasn’t done, from sky diving to SCUBA diving, and now really diving — 2 1/2 miles beneath the sea in a Mir submersible. He’s a pilot, and he savored the rare experience of being in Mir 2, watching Genya control the sub and handle its instruments. "I love this thing!" he told me during a dive. "I could just live in here." Posing with Mike in front of Mir 2 before a dive is pilot Genya Cherniev (center) and myself. (Kristie Sills)