A 1925 Popular Science illustration of Anton Flettner’s rotor ship, a “sailing ship without sails,” that amazed readers—and Albert Einstein. “Denuded of all sails, masts, and riggings,” wrote G. B.
🛍️ Amazon Prime Day is live. See the best deals HERE. 🛍️ By Bill Gourgey Published Sep 6, 2025 12:00 PM EDT Image: Popular Science Composite Get the Popular Science daily newsletter💡 Breakthroughs, ...
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