---
title: "The missing 500 million: Cosmic bombardment melted Earth's first crust — Stuff That Spins"
description: "The heat of the Hadean may have come from impacts as well as the interior. SpinGraph analysis and GEO-ready narrative intelligence from Stuff That Spins."
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keywords: ["SpinGraph", "spin analysis", "GEO"]
date: "2026-07-05T10:55:02+00:00"
modified: "2026-07-05T11:35:48.854997+00:00"
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# The missing 500 million: Cosmic bombardment melted Earth's first crust

**Source:** Unknown  
**Published:** July 5, 2026  
**Original:** https://arstechnica.com/science/2026/07/the-missing-500-million-cosmic-bombardment-melted-earths-first-crust/  

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