The Weight of an Element That Didn’t Exist Yet
In 1871, Dmitri Mendeleev left blanks in his periodic table for elements no one had found — and wrote down their atomic weight and density… Read More »The Weight of an Element That Didn’t Exist Yet
Southman
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.
Blueberry Blue Isn’t a Pigment
The blue in blueberries isn’t a pigment. Anthocyanin is closer to deep red or purple — the blue we see is a structural color, produced… Read More »Blueberry Blue Isn’t a Pigment
Entropy and Life: How Open Systems Escape the Universe’s Drift Toward Disorder
Cells build and repair themselves nonstop even as the universe as a whole drifts toward disorder. The answer lies in the difference between an isolated… Read More »Entropy and Life: How Open Systems Escape the Universe’s Drift Toward Disorder
The Refrigerator Doesn’t Make Cold – It Moves Heat, and Its Coolant Once Tore a Hole in the Sky
A refrigerator has no device that manufactures cold – it forces heat to flow backward against the second law of thermodynamics, using phase-change refrigerants inside… Read More »The Refrigerator Doesn’t Make Cold – It Moves Heat, and Its Coolant Once Tore a Hole in the Sky
How a Python Rebuilds Its Organs to Digest a Meal the Size of Its Own Body
After months of fasting, a python swallows prey as heavy as itself. Within days its intestines swell to 300% of normal and metabolism spikes up… Read More »How a Python Rebuilds Its Organs to Digest a Meal the Size of Its Own Body
Jumping Spiders Judge Distance by Deliberately Blurring Their Own Vision
Jumping spiders have no stereo vision and no camera-like lens, yet they leap onto prey with pinpoint accuracy. The secret lies in a four-layer retina… Read More »Jumping Spiders Judge Distance by Deliberately Blurring Their Own Vision