Complex sentence: The reasons for this have been the subject of idle speculation for many years but in 2001, Dr. Karl Kruszelnicki of the University of Sydney, Australia, undertook a systematic survey to determine the ins and outs of navel lint.
Split into simpler sentences: The reasons for this have been the subject of idle speculation for many years. In 2001, Dr. Karl Kruszelnicki of the University of Sydney, Australia, undertook a systematic survey to determine the ins and outs of navel lint.