Brain Snacks: Tasty Tidbits of Knowledge
Einstein explained that the closer you get to the speed of light, the slower time seems to go for you from the perspective of someone who is not moving. It's all Einstein's fault that Ender lives so long.
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Piggies are not the only animal-plant things around. On earth, a green sea slug has taken some photosynthesizing genes from algae so it can synthesize food. It would do well on Lusitania. (Source)
To become a saint in the Catholic Church, you have to have two convincing miracles. Os Venerados are just Venerable—that means they are awesome and spiritual, but don't have any miracles attested yet. (Source)