The Apennines were created in the Apennine orogeny beginning in the early Neogene (about 20 mya, the middle Miocene) and continuing today. Geographically they are partially or appear to be continuous with the Alpine system. Prior to the explosion of data on the topic from about the year 2000 many authors took the approach that the Apennines had the same origin as the Alps. Even today some authors use the term Alpine-Apennine system. They are not, however, the same system and did not have the same origin. The Alps were millions of years old before the Apennines rose from the sea.