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The timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on planet Earth. Dates in this article are consensus estimates based on scientific evidence , mainly fossils .
Timeline of postmortem changes. Figure 1. Post-mortem phenomena to estimate the time of death. The post-mortem interval (PMI) is the time that has elapsed since an individual's death. [1] When the time of death is not known, the interval may be estimated, and so an approximate time of death established.
The postmortem interval (PMI) is also called the time since death. It is the time lapse between death and discovery. After death, decomposition occurs. Decomposition includes physical, chemical, and biological changes. [19] Below are some of the biochemical changes that happen during decomposition which can help estimate the time since death ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
Evolution of fish – Origin and diversification of fish through geologic time; Evolution of insects – Development of insects from an ancestral crustacean and their subsequent radiation Evolution of butterflies – Origin and diversification of butterflies through geologic time
These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history
One of the most iconic performers of the 20th century, Whitney Houston’s legacy will remain as long as music can be played. With the release of the new biopic, Whitney Houston: I Wanna Dance ...
Individual death – termination of all biological functions within a living organism; Extinction – the death of an entire species, or more specifically, death of the last member of a species Extinction event – a widespread and rapid decrease in the amount of life on Earth. Such an event is identified by a sharp reduction in the diversity ...