/u/greenmask's posts
What's the earliest book we know that teaches (actual) history? As in, do we know the oldest history textbook?
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How did sailors keep fish and whale meat from going bad during long voyages before 1600s? How was meat preserved in general?
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How do we have human races? Can a certain race change into another without mixing if they move to a place with different climate?
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Since there is a super massive black hole in the center of our galaxy, does it affect our space and time differently compared to a rogue planet far away? How much influence does the super massive black hole in our center have on us?
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