The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Harvard University:
Time Trails is a mobile navigation tool for the exhibition "Time and Time Again: How Science and Culture Shape the Past, Present and Future".The application extends the Time and Time Again exhibit beyond the confines of the main gallery space, to include around 40 additional objects and exhibits in all of the Harvard Museums of Science and Culture as well as other spaces of the Harvard University Campus.The Time and Time Again exhibition is curated by the Collection of Historical Scientific Instruments, Harvard University in collaboration with the other members of the Harvard Museums of Science and Culture: The Harvard Museum of Natural History, The Peabody Museum of Archaeology and Ethnology, and The Semitic Museum at Harvard.