第 13 集: 地質學家造訪溫泉飯店，在屋頂灰塵中發現宇宙球粒。

13

The geologists visit a classy hot-spring hotel. A white stone ring proves to be lime from the spring deposited in a pipe. Nagi speaks of career opportunities for geologists. At night they watch for shooting stars. Nagi reveals that rooftop dust may contain micrometeorites that can be harvested with a magnet. With the aid of a microscope, they find a cosmic spherule. Ruri reflects on the fun of scientific discovery and looks forward to more. (Source: Wikipedia)