Life on Miavegr
Life appeared on the planet Miavegr around 4 billions years before present.
Origin
First unicellulars (4Gy BP)
The first organisms appeared on the surface of Miavegr after a period of strong activities of the Semor (the star). The planet had cooled down enough to have a global ocean but its magnetic field had still not stabilized. The high levels of gamma rays and UV permitted the splitting of water in hydrogen and oxygen; the strong solar wind carried out the light hydrogen while the oxygen enriched the atmosphere. The first simple organisms emerged on the first landmasses in water pools. These first organisms where made of a lipid bi-layer containing a set of auto-replicating proteins. However after the first 500 million years the Cobalt Porphyrin-Peptide Mesh (CPPM) evolved in the first oxygen-photosynthesizing organism. These polymers first evolved as part of the photosynthesis metabolism, but quickly became an effective way of encoding protein information. This gave rise to a rapid diversification of these unicellulars.
First unicellulars (2 Gy BP)
Two billions years ago, Semor stabilized and Miavegr became a much more stable planet with a strong internal magnetic field. The oxygen levels continued to rise thanks to photosynthesizing lifeforms. Some of these simple cells evolved phagocytosis and a more complex internal structure with a nucleus and organelles. The drop in sunlight, provoked a 100 million years of global ice age. To this event only a small part of the great diversity of unicellulars survived. Three groups of simpler organisms: the
