Space, solar system and the Earth -- Solid Earth -- Life on the Earth 1 -- Life on the Earth 2 -- Topics of the Archean (and Hadean) Earth -- Topics of the Precambrian Earth -- Biosignatures in ancient rocks and related issues -- Early (Paleo- to Meso-) Archean cellularly-preserved biosignatures -- Overview of the Pilbara Microstructures 1: the Farrel Quartzite assemblage -- Overview of the Pilbara Microstructures 2 : the Strelley Pool Formation assemblage -- Biogenicity of the Pilbara Microstructures -- Lifecycle and mode of life of the Pilbara microfossils -- Facts and problems of the Pilbara Microfossils and related issues.