After a light-duty weekend, the International Space Station's newest flight engineers, Cady Coleman, Dmitry Kondratyev and Paolo Nespoli, each had time set aside to study the layout of their orbital home for the next five months and learn to move about in its large habitable space. The trio also conducted routine on-orbit hearing assessments. Coleman, Kondratyev and Nespoli arrived at the station Dec. 17 aboard the Soyuz TMA-20 spacecraft.