From First Principles cover image

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
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