2 extra omake Science Lesson specials released on the LD-BOX set. Includes: Chapter 4+1 and Final Chapter.

The science lessons are short "omake" bonus features originally present on the first two volumes. Each short lasts around two minutes, and stars super deformed versions of Noriko, Kazumi and the Coach explaining the various scientific aspects of the series. <br><br>
(Source: Wikipedia) 

Extra science lessons included with the Gunbuster Blu-ray Box Complete Edition. These explain how the space ropeway works, and time dilation from near-lightspeed travel.

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