Logarithmic Timeline - Example of A Backward-looking Logarithmic Timeline

Example of A Backward-looking Logarithmic Timeline

In this table each row is defined in years ago, that is, years before the present date, with the most recent at the top of the chart. Each event is an occurrence of an observed or inferred process. (Note that the logarithmic scale never actually gets to zero.)

Years Ago Period Event, Invention or Historical development
10−3 to 10−2 last 3 days See, for example, the content of Today's events, Yesterday's and the day before.
10−2 to 10−1 last 36 days See, for example, the content in Portal:Current events
10−1 to 100 last year more...
100 to 101 2000 to present: 2000s WWW, Biotechnology, Nanotechnology, Global warming, more...
101 to 102 20th century Car to spacecraft, Nuclear power, Antibiotics, Electronics, Totalitarianism, World wars, more...
102 to 103 1000 to 1900, Middle Ages Renaissance, Printing press, Industrial Revolution, Colonialism, Firearms, Steam engine, more...
103 to 104 Start of Holocene, 8000 BC to AD 1000, Neolithic, Bronze Age, Iron Age Cities, Empires, Writing, Wheel, Civilization, Religions, Philosophy, more...
104 to 105 Pleistocene ends, Paleolithic ends, Mesolithic, beginning of Neolithic Ice age, Music, Art, Cave paintings, Dance, Tally stick, Medicine, Neandertal extinction, Flores Man extinction, advanced Homo erectus sub-species extinction, Ice age ends, Domestication – Agriculture and Animal husbandry
105 to 106 Pleistocene, Paleolithic Human (150 KYA), Language, Ice age, Spirituality
106 to 107 Pliocene, Paleolithic begins, Lower Paleolithic Evolution of Homo sapiens (~2 MYA), Hunting – Gathering, Tools, Fire
107 to 108 Late Cretaceous, Cenozoic Grasses, Mammals, Cretaceous–Paleogene extinction event
108 to 109 Paleozoic, Mesozoic Cambrian explosion of life, Animals, Flowering plants, Permian-Triassic extinction event
109 to 1.4×1010 Precambrian, Cosmology Big Bang, Stars and galaxies, Earth, Life

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