STS-58 Columbia (October 18 to November 1, 1993). This record duration 14-day mission was recognized by NASA management as the most successful and efficient Spacelab flight flown by NASA. The STS-58 crew performed neurovestibular, cardiovascular, cardiopulmonary, metabolic and musculoskeletal medical experiments on themselves and 48 rats, expanding our knowledge of human and animal physiology both on Earth and in spaceflight. In addition, they performed 16 engineering tests aboard the Orbiter Columbia and 20 Extended Duration Orbiter Medical Project experiments. The mission was accomplished in 225 orbits of the Earth, traveling 5.8 million miles in 336 hours, 13 minutes and 1 second. Landing was at Edwards Air Force Base, California. In completing this flight, Lucid logged 838 hours and 54 minutes in space.