Impossible+constructions

[|M.C. Escher], graphic artist - Maurits Cornelis Escher (1898-1972) is most famous for his so-called impossible constructions, such as Ascending and Descending, Relativity, his Transformation Prints, such as Metamorphosis I, Metamorphosis II and Metamorphosis III, Sky & Water I or Reptiles.

[|Impossible Constructions] -

[|Convex and Concave] - Lithography

[|Lithography] - It is a mechanical planographic process in which the printing and non-printing areas of the plate are all at the same level. Lithography is based on the chemical repellence of oil and water. Designs are drawn or painted with greasy ink or crayons on specially prepared limestone. The stone is moistened with water, which the stone accepts in areas not covered by the crayon. An oily ink, applied with a roller, adheres only to the drawing and is repelled by the wet parts of the stone. The print is then made by pressing paper against the inked drawing.

[|Convex and Concave] is a famous drawing by M.C. Escher. Sometimes artists create drawings that are not realistic.
 * What's the problem?**
 * **Ask** - So what is wrong with this picture?
 * **Imagine** - What shapes are included in the picture? How are the lines and the curves connected?
 * **Design, Build** - What are the people doing? Could this structure be built?
 * **Improve** - How could this structure be improved?


 * That's engineering**
 * convex
 * concave

> convex, concave, curve, repellence,
 * Engineering ideas**

Challenges for you to work on...
 * Do It**


 * News, updates**


 * Learn more...**
 * [|Escher Convex and Concave]

..r0 3a