Universal Timeline

Formation of Sun (4,680 to 4,630 Ma).

Formation of Earth (4,570 to 4,567.17 Ma), Early Bombardment Phase begins.

Formation of Moon (4,533 to 4,527 Ma), probably from giant impact, since the end of this era.

Possible first appearance of plate tectonics. This unit gets its name from the lunar geologic timescale when the Nectaris Basin and other greater lunar basins form by big impact events. Earliest evidence for life based on unusually high amounts of light isotopes of carbon, a common sign of life.

End of the Early Bombardment Phase. Oldest known mineral (Zircon, 4,404 ± 8 Ma).

Indirect photosynthetic evidence (e.g., kerogen) of primordial life. This era overlaps the beginning of the Late Heavy Bombardment of the Inner Solar System, produced possibly by the planetary migration of Neptune into the Kuiper belt as a result of orbital resonances between Jupiter and Saturn. Oldest known rock (4,031 to 3,580 Ma).

The oldest ascertained life form of fossilized bacteria in microbial mats, 3,480 million years old, found in Western Australia, is from this era

The Isua Greenstone Belt is an Archean greenstone belt in southwestern Greenland. The belt is aged between 3.7 and 3.8 Ga, making it among the oldest rock in the world. The belt contains variably metamorphosed mafic volcanic and sedimentary rocks. The occurrence of Boninitic geochemical signatures offers evidence that plate tectonic processes may be responsible for the creation of the belt. Pillowed basalts indicate that liquid water existed on the surface at this time.- Wikipedia (includes (as of edit of 15 June 2011 ) comprehensive list of references)

The oldest ascertained life form of fossilized bacteria in microbial mats, 3,480 million years old, found in Western Australia, is from this era

Thw split between bacteria and archaea occurs.

Diversification and expansion of acritarchs.

Photosynthesizing cyanobacteria evolved; they used water as a reducing agent, thereby producing oxygen as a waste product.

The Pongola glaciation occurred around 2,900 million years ago.

Oldest evidence for microbial life on land in the form of organic matter-rich paleosols, ephemeral ponds and alluvial sequences, some of them bearing microfossils.

The oldest ascertained life form of fossilized bacteria in microbial mats, 3,480 million years old, found in Western Australia, is from this era

The supercontinent Kenorland formed during this period, about 2.7 billion years ago.

The Huronian glaciation (or Makganyene glaciation) was a glaciation that extended from 2.4 billion years ago (Gya) to 2.1 Gya, during the Siderian and Rhyacian periods of the Paleoproterozoic era. The Huronian glaciation followed the Great Oxygenation Event (GOE), a time when increased atmospheric oxygen decreased atmospheric methane. The oxygen combined with the methane to form carbon dioxide and water, which do not retain heat as well as methane does.   It is the oldest and longest ice age, occurring at a time when only simple, unicellular life existed on Earth. This ice age led to a mass extinction on Earth.

The Great Oxidation Event (GOE), sometimes also called the Great Oxygenation Event, Oxygen Catastrophe, Oxygen Crisis, Oxygen Holocaust, or Oxygen Revolution, was when Earth's atmosphere and the shallow ocean experienced a rise in oxygen around 2.4 billion years ago (2.4 Ga) to 2.1-2.0 Ga during the Paleoproterozoic era. Geological, isotopic, and chemical evidence suggests that biologically induced molecular oxygen (dioxygen, O2) started to accumulate in Earth's atmosphere and changed Earth's atmosphere from a weakly reducing atmosphere to an oxidizing atmosphere. The causes of the event remain unclear.

The Francevillian biota (also known as Gabon macrofossils or Gabonionta) is a group of 2.1-billion-year-old Palaeoproterozoic, macroscopic organisms known from fossils found in Gabon in the Palaeoproterozoic Francevillian B Formation, a black shale province. The fossils are regarded as evidence of the earliest form of multicellular life.

Earliest known eukaryote fossils found

End of the Huronian Glaciation.

The Great Oxidation Event (GOE), sometimes also called the Great Oxygenation Event, Oxygen Catastrophe, Oxygen Crisis, Oxygen Holocaust, or Oxygen Revolution, was when Earth's atmosphere and the shallow ocean experienced a rise in oxygen around 2.4 billion years ago (2.4 Ga) to 2.1-2.0 Ga during the Paleoproterozoic era.

Hominidae (great ape ancestors) speciate from the ancestors of the gibbon (lesser apes).

Homininae ancestors speciate from the ancestors of the orangutan. Pierolapithecus catalaunicus is thought to be a common ancestor of humans and the other great apes, or at least a species that brings us closer to a common ancestor than any previous fossil discovery. It had the special adaptations for tree climbing as do present-day humans and other great apes: a wide, flat rib cage, a stiff lower spine, flexible wrists, and shoulder blades that lie along its back.

The latest common ancestor of humans and chimpanzees is estimated to have lived between c. 10 and 4 Ma. Both chimpanzees and humans have a larynx that repositions during the first two years of life to a spot between the pharynx and the lungs, indicating that the common ancestors have this feature, a precondition for vocalized speech in humans. Speciation may have begun shortly after 10 Ma, but late admixture between the lineages may have taken place until after 5 Ma. Candidates of Hominina or Homininae species which lived in this time period include Ouranopithecus (c. 8 Ma), Graecopithecus (c. 7 Ma), Sahelanthropus tchadensis (c. 7 Ma), Orrorin tugenensis (c. 6 Ma).     Ardipithecus Ardipithecus is, or may be, a very early hominin genus (tribe Hominini and subtribe Hominina). Two species are described in the literature: A. ramidus, which lived about 4.4 million years ago[27] during the early Pliocene, and A. kadabba, dated to approximately 5.6 million years ago[28] (late Miocene). A. ramidus had a small brain, measuring between 300 and 350 cm3. This is about the same size as the modern bonobo and female common chimpanzee brain; it is somewhat smaller than the brain of australopithecines like Lucy (400 to 550 cm3) and slightly over a fifth the size of the modern Homo sapiens brain. Ardipithecus was arboreal, meaning it lived largely in the forest where it competed with other forest animals for food, no doubt including the contemporary ancestor of the chimpanzees. Ardipithecus was probably bipedal as evidenced by its bowl shaped pelvis, the angle of its foramen magnum and its thinner wrist bones, though its feet were still adapted for grasping rather than walking for long distances.

A member of the Australopithecus afarensis left human-like footprints on volcanic ash in Laetoli, northern Tanzania, providing strong evidence of full-time bipedalism. Australopithecus afarensis lived between 3.9 and 2.9 million years ago, and is considered one of the earliest hominins—those species that developed and comprised the lineage of Homo and Homo's closest relatives after the split from the line of the chimpanzees.   It is thought that A. afarensis was ancestral to both the genus Australopithecus and the genus Homo. Compared to the modern and extinct great apes, A. afarensis had reduced canines and molars, although they were still relatively larger than in modern humans. A. afarensis also has a relatively small brain size (380–430 cm³) and a prognathic (anterior-projecting) face.   Australopithecines have been found in savannah environments; they probably developed their diet to include scavenged meat. Analyses of Australopithecus africanus lower vertebrae suggests that these bones changed in females to support bipedalism even during pregnancy.

Fundación del primer asentamiento fijo, la aldea de Yangsang.

Rai was an Earth-like planet that happened to evolve quickly and start galactic colonization around the 3 000 UC, after a near 4 000 years of internal political and social evolution and pseudounion inside.

El quinto y final nivel de terraformación se desarrolló en paralelo a los niveles tercero y cuarto, acortando su duración a un año estándar. A partir de aquí la expansión fue exponencial y se decidió no intentar reducir más su duración, aunque sabiéndose posible, por una cuestión administrativa.