original: he traveled over 200,000 miles , an incredible achievement for pre-aviation times .
simplifications: he traveled over 200,000 miles which was a great feat in the pre-aviation era . he traveled over 200,000 miles , an unbelievable record for pre-aviation times . he traveled over 200,000 miles , a great feat for a time before airplanes were invented . 1 . he traveled over 200,000 miles , an incredible achievement for times before aviation was discovered . he made an incredible achievement for pre-aviation times by traveling over 200,000 miles . he traveled over 200,000 miles , an incredible achievement for pre-aviation times . he traveled over 200,000 miles , an unbelievable achievement for pre-aviation themes . he traveled over 200,000 miles , an incredible achievement for pre-aviation times .