Earth's inner core - Wikipedia

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3 Ways to Make a Model of the Earth - wikiHow

Inge Lehmann - Wikipedia

Mantle (geology)

How do we know the earth's mantle exists? - Quora

What are the Earth's layers?

Core

Interior of the Earth: Core, Mantle and Crust - UPSC

Inge Lehmann - Wikipedia

Corey S Powell: Researchers at Australian Nati… - Mastodon