Cyanobacteria,thanks to it,life was able to live on land.
Cyanobacteria Temporal range: 3800–0Ma Had'n Archean Proterozoic Pha. Tolypothrix sp. Scientific classification Domain: Bacteria Kingdom: Eubacteria Superphylum: Terrabacteria Phylum: Cyanobacteria Stanier, 1973 Orders As of 2014 the taxonomy was under revision Chroococcales Chroococcidiopsidales Gloeobacterales Nostocales Oscillatoriales Pleurocapsales Spirulinales Synechococcales Incertae sedis †Gunflintia †Ozarkcollenia Synonyms Myxophyceae Wallroth, 1833 Phycochromaceae Rabenhorst...
The cyanobacteria have also been tremendously important in shaping the course of evolution and ecological change throughout earth's history. The oxygen atmosphere that we depend on was generated by numerous cyanobacteria photosynthesizing during the Archaean and Proterozoic Era. Before that time, the atmosphere had a very different chemistry, unsuitable for life as we know it today.