En 2012, le ministère de la Culture du Pérou a demandé la participation de spécialistes russes de la géologie pour aider à identifier la source du problème de l'effondrement des blocs mégalithiques dans la forteresse de Sacsayhuaman, située près de la ville de Cuzco, au Pérou. Les géologues ont effectué un balayage géoradar de la zone du mur mégalithique ainsi que de la zone de l'aréna "lac sacré". Ils ont pu déterminer les zones d'effondrement comme étant peut-être le résultat de cavités creuses sous le mur.

Reprint of the leading book on the methods of stone construction in Egypt from the beginnings at the pyramid complex of Djoser at Saqqara in 2700 B.C. through the pyramids of the Old and Middle Kingdoms to the hypostyle hall at Karnak and other buildings. The book covers the production, quarrying, and transport of stone and tools used in the buildings, and combats speculative literature on how the builders solved certain technical problems.

Quels secrets le plateau de Gizeh détient-il vraiment ?
Qui essaie de les débloquer... et quelles sont leurs motivations ?

Three-dimensional printing, or additive manufacturing, is an emerging manufacturing process. Research and development are being performed worldwide to provide a better understanding of the science and technology of 3D printing to make high-quality parts in a cost-effective and time-efficient manner. This book includes contemporary, unique, and impactful research on 3D printing from leading organizations worldwide.

Make: Getting Started with 3D Printing, Second Edition, is a practical, informative, and inspiring book that guides readers step-by-step through this new manufacturing technology. The book includes fundamental
topics such as a short history of 3D printing, the best hardware and software choices, hands-on CAD tutorial exercises, examples of how you can apply 3D printing to your personal life, professional work, and a new section for how to make money with 3D printing.

The 3D Printing Handbook provides practical advice on selecting the right technology and how-to design for 3D printing, based upon first-hand experience from the industry’s leading experts.

Learn all you need to know about 3D printing in 30 minutes or less.

https://www.hubs.com/get/3d-printing-guide/

Vous avez peut-être entendu parler de l'impression 3D à la TV ou lu à ce sujet sur Internet.