https://rahjoo.org/blog Personal blog, research publications, and resume showcase en-us mrahjoo@proexergy.com (Dr. Mohammad Rahjoo) mrahjoo@proexergy.com (Dr. Mohammad Rahjoo) Fri, 04 Sep 2026 00:00:00 GMT https://rahjoo.org/blog/hexagon-six-sided-secret-universe.en https://rahjoo.org/blog/hexagon-six-sided-secret-universe.en A journey from a simple word-root question — is 'hex' in hexagon related to a witch's curse? — into semiconductor crystal structures, hexagonal pixel sensors, red blood cells, and a 2,000-year-old geometry problem that took until 1999 to prove. Fri, 04 Sep 2026 00:00:00 GMT mrahjoo@proexergy.com (Dr. Mohammad Rahjoo) engineeringphysicsmaterials-sciencethought-experiment https://rahjoo.org/blog/hexagon-six-sided-secret-universe.es https://rahjoo.org/blog/hexagon-six-sided-secret-universe.es Un viaje desde una simple pregunta sobre la raíz de una palabra —¿está el "hex" del hexágono relacionado con la maldición de una bruja?— hacia las estructuras cristalinas de los semiconductores, sensores de píxeles hexagonales, glóbulos rojos, y un problema geométrico de 2.000 años que no se logró probar hasta 1999. Fri, 04 Sep 2026 00:00:00 GMT mrahjoo@proexergy.com (Dr. Mohammad Rahjoo) engineeringphysicsmaterials-sciencethought-experiment