111, 333, 666, and many other curious digits. What are Demlo numbers?

The Earth map used in the UN flag: 33 sectors A grid, probably representing parallels and meridians, divides the Earth in 33 sectors. Another special number is 11, 33 being a multiple of it. You probably wonder what  it means and what relation have these numbers with the Earth. 33 appears immediately as a particular number, being a palindrome. Moreover 3×3=9;  33×3=99… another palindromic digit I like is the number 12321. If you sum all digits, you’ll obtain[…]

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How to model your Earth with Google Sketchup

Sketchup is a 3D CAD software by Google. Many people do not consider it as a professional CAD but it has some good characteristics: –It is free: you can easily download it from sketchup.com; –It is simple to use and it enjoys of an excellent support on Internet with many tutorial videos; –It doesn’t require a workstation but you can reach satisfactory results even without having dedicated graphic board installed on your PC. When focusing the[…]

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The myth of Europa and Zeus, or the marriage of the Earth and the Sky

Daedalus, ut fama est, fugiens Minoia regna,….posuitque immania templa….hic crudelis  amor tauri suppostaque furto Pasiphae, mixtumque genus prolesque biformis Minotaurus  inest. Daedalus,  so the story goes,  flying the Cretan shore….built this boundless temple… here is the cruel bull’s love and the abduction of Pasiphae,…and the double  hybrid nature of the Minotaurus…                               From Aeneid, Book 6th In my first issue in[…]

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