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The timeline begins at the Bronze Age, as it is difficult to give even estimates for the timing of events prior to this, such as of the discovery of counting, natural numbers and arithmetic. To avoid overlap with timeline of historic inventions , the timeline does not list examples of documentation for manufactured substances and devices unless ...
Such discoveries are often a multi-step, multi-person process. Multiple discovery sometimes occurs when multiple research groups discover the same phenomenon at about the same time, and scientific priority is often disputed. The listings below include some of the most significant people and ideas by date of publication or experiment.
1944 – Barbara McClintock breeds maize plants for color, which leads to the discovery of jumping genes. 1947 – John Bardeen and Walter Brattain fabricate the first working transistor . 1951 – Solomon Asch shows how group pressure can persuade an individual to conform to an obviously wrong opinion.
A history of multiple discoveries involving LATE appears in Baker and Lindeman (2024). [ 127 ] 1998: Saul Perlmutter , Adam G. Riess , and Brian P. Schmidt —working as members of two independent projects, the Supernova Cosmology Project and the High-Z Supernova Search Team —simultaneously discovered in 1998 the accelerating expansion of the ...
However, numerous discoveries in recent decades have pushed the timeline back even further. For example, archaeologists found older artifacts at a 14,500-year-old site in Chile.
Entries beginning with "Timeline of " are ordered by the rest of their names. (For example: Timeline of geology is listed under "G".) Further, timelines containing extra wording before the key concept are indexed under the key concept. (For example: Timeline of discovery of Solar System planets and their moons is listed under "S".)
Image credits: anon #14. Carbon dioxide was blamed for the deaths of around 1700 people in Cameroon, west Africa, in 1986 when a massive release of gas occurred from Lake Nyos, a volcanic crater lake.
The Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...