I am In Nam, the editor of glu.kr. Under the mission “God Loves U: learn, discuss, and explain all things that God created,” I write across six areas — culture, history, science, plants, animals, and climate. Every article begins as an AI-assisted draft, then goes through source checks, numerical verification, and terminology review before I read and edit it myself for publication. Images carry their source and license, with freely licensed material preferred. If you find an error, write to south-man@daum.net. I verify it, correct the article, and note the change.
More than 80,000 woodblocks have lasted over 770 years with no special machinery. From wild-cherry blocks, end pieces and lacquer to Janggyeong Panjeon’s siting, lattice… Read More »How 80,000 Woodblocks Survived 770 Years — The Conservation Design of the Tripitaka Koreana and Janggyeong Panjeon
The eerie blue glow of a reactor pool is not the color of radioactivity, nor a broken speed limit of light. It is a ‘sonic… Read More »Why Do Reactor Pools Glow Blue? Cherenkov Radiation and Particles Faster Than Light in Water
Its name says ‘shrimp’ but it is not a true shrimp; its fist flies through water like a bullet and boils it; and its famously… Read More »A Fist That Boils Water and 12 Color Receptors — Two Beliefs the Mantis Shrimp Overturns
A superconductor floating above a magnet stays put even when flipped or tilted. The force that lifts it and the force that locks it are… Read More »A Metal Disk Frozen in Mid-Air — Why a Superconductor Won’t Fall Even Hanging Upside Down
The electric eel is not actually an eel. A South American knifefish, it turns its whole body into a living battery of thousands of electrocytes… Read More »The Fish That Is a Battery — How the Electric Eel Makes 860 Volts
Why does a rainbow always appear at 42°, why is it actually a full circle rather than a semicircle, and why does everyone see their… Read More »A Rainbow Isn’t a Semicircle — It’s a Circle: The 42° Geometry Drawn by a Single Raindrop
