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Kaette Kita Top wo Nerae! Kagaku Kouza
Kaette Kita Top wo Nerae! Kagaku Kouza, Aim for the Top! Gunbuster Science Lesson Returns, Gunbuster New Science Lessons, Science Course Return, 帰ってきた トップをねらえ! 科学講座
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.