deletions | additions       diff --git a/layout.md b/layout.md  index 54e24a9..6117c55 100644  --- a/layout.md  +++ b/layout.md 
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figures/Drake4/Drake1.jpg  Intro.tex  Universe.tex  Numbers.tex Borucki.tex  Equation.tex  figures/Drake3/Drake_explained.png  Space broadcasting.tex