SYDNEY, May 14 (Reuters) - The platypus, a species unique to Australia, was reintroduced into the country’s oldest national park just south of Sydney on Friday in a landmark conservation project after disappearing from the area more than half a century ago. "(It is) very exciting for us to see platypuses come back into the park, for a thriving population here to establish themselves and for Sydneysiders to come and enjoy this amazing animal," said Gilad Bino, a researcher from UNSW'S Centre for Ecosystem Science. See here for a complete list of exchanges and delays