David Butler

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How Far Away Is It - 2025 Review

The Chemistry of Life Basics

How Fast Is It - Chapter 7 - Black Holes (4K)

David Butler on Believing in a God Bigger Than Religion

How Far Away Is It - 2023 Review

How Far Away Is It - Chapter 16 - The Cosmos (4K)

How Old Is It - Chapter 3 - Big Bang ΛCDM Cosmology (4K)

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