Mapping the ocean floor with ancient tides / Watch this ultra-detailed animation of the seafloor / Next-generation water satellite maps seafloor from space / Surface-based sonar system could rapidly map the ocean floor at high resolution / Satellite measurements make major seafloor map improvements / Sonar image was not Amelia Earhart plane, exploration team says / New Niwa vessel to study the sea floor in the Hauraki Gulf / Explorer Shackleton's last ship discovered 'intact' on sea floor - as sonar image released / Explorers believe sonar image shows Amelia Earhart's missing plane