Jack Krijnen
Mathematician Jack Krijnen from the Netherlands has made inventing lasting contributions to the world of mechanical puzzles a passion project over his lifetime. He studied at the Eindhoven University of Technology, where he first fell in love with mechanical puzzles. He was naturally drawn to the mathematical nature of complex interlocking burr designs, and the first puzzle he ever made was Van der Poel's 18-piece burr, with a small hand saw and old chisel. His autobiographical puzzle boxes are among the best in the world.
Featured
The Paleolithic era Tuc d'Audoubert cave is located in the south of France. The masterpieces of this cave are two clay bisons, the best preserved examples of clay modellings in the whole of European cave art. They are 15,000 years old, and have become iconic.