There are two sorts of component of the universe that are called "dark": dark matter and dark energy. They are unidentified, but inevitable for the scientific explanation of the existing universe. In this lecture, some latest outcomes of the research of dark matter and dark energy are introduced, and their "goodness" and "badness" are discussed.

NOTE:
- This lecture was conducted only in Japanese.
- This content is also available on iTunes U. Refer to “Supplement” below.
(You can play the video offline by downloading it on your iTunes.)