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Newton Relics

In an editorial taking Kyrie Irving to task for his comments about the shape of the earth, “Between Kyrie Irving’s flat Earth and Isaac Newton’s apple tree, science remains a process of understanding,” Glenn Starkman and Patricia Princehouse remark: We have an apple tree on the Case Western Reserve University campus grown from a twig …

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Byzantine Structure of the Cosmos

This diagram showing the structure of the cosmos comes from Nicephorus Blemmydes’ “Epitome physica.” At the center is the sphere of elemental earth surrounded by a narrow sphere of water. Then a broad sphere of air surrounds them capped by the sphere of fire. Separating the elements from the heaves is the sphere of the …

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