History of Earth
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The natural history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main ev
An artist's rendering of a protoplanetary disk
Artist's conception of Hadean Eon Earth, when it was much hotter and inhospitable to all forms of life.
Artist's impression of the enormous collision that probably formed the Moon
The pale orange dot, an artist's impression of the early Earth which might have appeared orange through its hazy methane rich prebiotic second atmosphere. Earth's atmosphere at this stage was somewhat comparable to today's atmosphere of Titan.
Geologic time scale
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The geologic time scale or geological time scale describes how geologic time is divided into standardised intervals. It uses the rock record together with the principles of chronostratigraphy to place
History of Earth
…have contributed to the understanding of the main events of Earth's past, characterized by constant geological change and biological evolution. The geological time scale (GTS), as defined by international convention, depicts the large spans of time from the beginning of Earth to the present, and its divisions chronicle…
Sketch of the Succession of Strata and their Relative Altitudes (William Smith)
One example of an obsolete geological time scale (France, mid-1940s).
Marine sandglass MMM