Add graphic showcasing evolution of life (#270)

* Add graphic showcasing evolution of life

* Add PR Feedback

* Add comment

* Update date format

* Fix small mistakes

* Add pangea, rewrite intro

* Fix citation, improve intro. Thanks alanblue

* Add indicator for full span and months

* Color improvements

book/references.bib

@@ -98,6 +98,33 @@
   howpublished = {\url{https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6077754/}}
 }
 
+@article{switzerland+bread,
+  author    = {Pasquale Catzeddu},
+  title     = {Flour and Breads and their Fortification in Health and Disease Prevention},
+  pages     = {37--46},
+  year      = {2011}
+}
+
+@book{Yong_2017,
+  place     = {London},
+  title     = {I contain multitudes: The microbes within US and a grander view of life},
+  publisher = {Vintage},
+  author    = {Yong, Ed},
+  year      = {2017},
+  pages     = {5--9}
+}
+
+@article{egyptian+bread,
+  title     = {Investigation of ancient Egyptian baking and brewing methods by correlative microscopy},
+  volume    = {273},
+  DOI       = {10.1126/science.273.5274.488},
+  number    = {5274},
+  journal   = {Science},
+  author    = {Samuel, Delwen},
+  year      = {1996},
+  pages     = {488–490}
+}
+
 @article{vienna+breadrolls,
   author    = {Eben Norton Horsford},
   title     = {Report on Vienna bread},