1. Lecture 7: Geologic History of Life Oldest signatures of life in sedimentary rocks: Microfossils Molecular fossils (mainly lipids) Stromatolites C and S isotopic signatures Pattern of nested similarity A fossil cyanobacterium in circa 1.5 Gyr old sedimentary rocks - (A. Knoll).

2. Signatures of early life on Earth Molecular Fossils and the rise of eukaryotes. Sterol biosynthesis - A. Pearson, J.Brocks, M.Budin (2003)

3. Stromatolites

4. Phylogenetic Tree of Life The 3 Domains of Life - Fig.2.1 - A. Knoll (2003).

5. Phylogenetic Tree of Life

6. Science, 2006