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All the small circles actually move in a straight line.
Posted 6 days ago by stitch in category: interesting   Comments (3)


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Posted 1 year ago by boyt in category: interesting   Comments (1)


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NASA
Posted 1 year ago by boyt in category: interesting   Comments (3)



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Dry ice is the solid form of carbon dioxide.
Posted 7 months ago by boyt in category: interesting   Comments (3)


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Posted 5 months ago by boyt in category: interesting   Comments (0)