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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 .
Since lancelets lack a heart, it possibly emerged in this ancestor (previously the blood vessels themselves were contractile) though it could have been lost in lancelets after evolving in early deuterostomes (hemichordates and echinoderms have hearts). 520-480 Ma Agnatha. The first vertebrates ("fish") appear: the Agnathans.
Emergent evolution is the hypothesis that, in the course of evolution, some entirely new properties, such as mind and consciousness, appear at certain critical points, usually because of an unpredictable rearrangement of the already existing entities.
Elon Reeve Musk (/ ˈ iː l ɒ n m ʌ s k /; born June 28, 1971) is a businessman known for his key roles in Tesla, Inc., SpaceX, and Twitter (), as well as in the United States government since 2025 as a senior advisor to President Donald Trump and head of the Department of Government Efficiency.
[29] [30] The concept of DOGE emerged in a discussion between Elon Musk and Donald Trump, where Musk floated the idea of a department for streamlining government efficiency. In August 2024, Trump said at a campaign event that, if he were elected, he would be open to giving Musk an advisory role. [ 31 ]
The timing at which life emerged on Earth is most likely between 3.48 and 4.32 Gya. Minimum age estimates are based on evidence from the geologic rock record . In 2017, the earliest physical evidence of life so far found was reported to consist of microbialites in the Nuvvuagittuq Greenstone Belt of Northern Quebec, in banded iron formation ...
Evolution of cells refers to the evolutionary origin and subsequent evolutionary development of cells. Cells first emerged at least 3.8 billion years ago [ 1 ] [ 2 ] [ 3 ] approximately 750 million years after Earth was formed.
The junkyard tornado derives from arguments most popular in the 1920s, prior to the modern evolutionary synthesis, which are rejected by evolutionary biologists. [ 5 ] [ 12 ] A preliminary step is to establish that the phase space containing some biological entity (such as humans, working cells, or the eye) is enormous, something not contentious.