CINCINNATI – With only nine months left until he pilots a history making mission to space, real estate investor and philanthropist Larry Connor has another groundbreaking piece of exploration to take care of. He is scheduled to make two dives to the deepest part of the ocean at more than 35,000 feet. Connor said he plans to explore both the Challenger Deep and the Sirena Deep in the Mariana Trench, located in the Pacific Ocean near Guam, he told the Cincinnati Enquirer, part of the USA TODAY Network. The "hadal zone," or the area of the ocean below 20,000 feet, is considered the last frontier of exploration on Earth. “Hadal exploration” is exploration at depths beneath 20,000 feet, or 6,000 meters.