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  2. History of Earth - Wikipedia

    en.wikipedia.org/wiki/History_of_Earth

    The history of Earth is divided into four great eons, starting 4,540 mya with the formation of the planet. Each eon saw the most significant changes in Earth's composition, climate and life. Each eon is subsequently divided into eras, which in turn are divided into periods, which are further divided into epochs. Eon.

  3. Geological history of Earth - Wikipedia

    en.wikipedia.org/wiki/Geological_history_of_Earth

    The Moon orbited Earth much closer, appearing much larger, producing more frequent and wider eclipses as well as tidal effects. [17] The Earth of the early Archean may have had a different tectonic style. During this time, the Earth's crust cooled enough that rocks and continental plates began to form. Some scientists think because the Earth ...

  4. Timeline of human evolution - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_human_evolution

    The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period. It includes brief explanations of the various taxonomic ranks in ...

  5. History of geology - Wikipedia

    en.wikipedia.org/wiki/History_of_geology

    Similar fossils were noted by Herodotus (about 490 BC). [2][3][4] Some of the first geological thoughts were about the origin of the Earth. Ancient Greece developed some primary geological concepts concerning the origin of the Earth. Additionally, in the 4th century BC Aristotle made critical observations of the slow rate of geological change.

  6. Human evolution - Wikipedia

    en.wikipedia.org/wiki/Human_evolution

    Human evolution. The hominoids are descendants of a common ancestor. Human evolution is the evolutionary process within the history of primates that led to the emergence of Homo sapiens as a distinct species of the hominid family that includes all the great apes. [1]

  7. Sapiens: A Brief History of Humankind - Wikipedia

    en.wikipedia.org/wiki/Sapiens:_A_Brief_History...

    The academic discipline of history is the account of cultural change. Harari surveys the history of humankind from the Stone Age up to the 21st century, focusing on Homo sapiens. He divides the history of Sapiens into four major parts: [3] The Cognitive Revolution (c. 70,000 BCE, the start of behavioral modernity when imagination evolved in ...

  8. Human history - Wikipedia

    en.wikipedia.org/wiki/Human_history

    Human history. Human history is the record of humankind from prehistory to the present. Modern humans evolved in Africa around 300,000 years ago and initially lived as hunter-gatherers. They migrated out of Africa during the Last Ice Age and had populated most of the Earth by the end of the Ice Age 12,000 years ago.

  9. Geologic time scale - Wikipedia

    en.wikipedia.org/wiki/Geologic_time_scale

    The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [5] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...

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