deletions | additions       diff --git a/layout.md b/layout.md  index 982cfe8..ac54af6 100644  --- a/layout.md  +++ b/layout.md 
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Intro1.tex  figures/Drake4/Drake_Equation.jpg  Intro.tex  Equation.tex Box.tex  How common are planets1.tex  figures/Drake3/Drake_Annotated.jpg  Parameters.tex