Stardust Log

A record of stardust, quietly accumulating.

Articles

Four Hours or a Hundred? Grid Batteries Find Their Own Lanes

Google and Xcel Energy chose an iron-based battery, not lithium-ion, for a record-setting grid storage project in Minnesota. As lithium-ion dominates short daily cycles, why does a battery built to run for four straight days matter? A look at the efficiency-versus-cost tradeoffs reshaping how grid batteries specialize in 2026.

Climate Tech

Ten Gene Edits or Six? What 271 Days With a Pig Kidney Really Proved

A New Hampshire man lived 271 days without dialysis after receiving a genetically engineered pig kidney — a record before the organ was ultimately removed. Comparing heavily edited US pig kidneys with China's simpler six-edit approach, this piece traces the real barrier facing pig-to-human organ transplants.

Medicine

200 Neurons and Counting — Dissecting AI's "Thoughts" in 2026

MIT Technology Review named mechanistic interpretability one of its Breakthrough Technologies of 2026. Work at Anthropic and Google DeepMind is starting to reveal what happens inside large language models once dismissed as black boxes — from circuits that plan a poem's rhyme in advance to chains of reasoning explainable by as few as 200 neurons.

AI