Doomberg is the pseudonymous green-chicken persona behind the most-read finance newsletter on Substack, with 373,000+ subscribers. Run by a tight-knit team of former heavy-industry executives and private-equity professionals, Doomberg delivers lateral-thinking analysis on energy, finance, and geopolitics - unapologetically pro-nuclear, data-driven, and fiercely independent. Launched in May 2021, the publication grew from zero to the #1 finance newsletter on Substack without spending a dollar on marketing, making it one of the most remarkable organic media success stories of the independent publishing era.
Zephyr Fusion is building the first in-orbit fusion power source - a compact, megawatt-class reactor designed to run in the vacuum of space. Founded by two physicists who met in grad school operating a spherical tokamak, the San Diego-based startup uses a levitated dipole magnetic confinement approach with high-temperature superconductors. Their bet: space makes fusion easier, not harder. With launch costs down 10x and mass-produced HTS tapes providing 10x more field per kilogram, Zephyr Fusion aims to power the industrial revolution that humanity is about to have off-planet.