
FFP EP. 2 | Hidden Star in Betelgeuse, Dancing Atoms, Ultra-High-Energy Cosmic Rays & VR Immunity
From First Principles
00:00
IceCube's proton‑fraction constraint
Krishna summarizes IceCube's finding that fewer than ~70% of the highest‑energy cosmic rays are protons, implying heavy nuclei contributions.
Play episode from 48:30
Transcript


