第 7 集: 在石化事件發生前，Senku 回憶起與 Xeno 和 NASA 在童年時期嘗試製造火箭的經歷。

As Senku realizes who Dr. Xeno is, he flashes back to when he was a child still attempting to build his first rocket with Taiju. A failed attempt had him reach out to NASA for assistance, where most of the scientists agreed to not give a child that kind of information. However, a 20 year old Xeno responds with instructions and materials he can use, allowing Senku to borrow his father Byakuya's government-supplied credit card to gather what he needs. At the same time, however, Xeno's own projects keep getting rejected at NASA, leaving him bitter. When approached with a hypothetical stone world scenario by Byakuya at NASA, Xeno says he would rule with an iron fist, destroying any who opposed him. On the eve of humanity's petrification, both Xeno and Senku analyze the petrified swallows, with Xeno realizing they're still alive and can maintain consciousness. As the petrification wave hits the planet, Xeno orders Stanley, Luna, and the others to remain conscious at all costs. Knowing they'd both need corn for their respective plans, Xeno and Senku strategize an eventual trip to California when they both suddenly break free of petrification. (Source: Wikipedia)

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