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Negative values, on systems that support them, indicate times before the Unix epoch, with the value decreasing by 1 for every non-leap second before the epoch. For example, 00:00:00 UTC on 1 January 1969 is represented in Unix time as −31 536 000. Every day in Unix time consists of exactly 86 400 seconds.
The Pleistocene (/ ˈ p l aɪ s t ə ˌ s iː n,-s t oʊ-/ PLY-stə-seen, -stoh-; [4] [5] referred to colloquially as the Ice Age) is the geological epoch that lasted from c. 2.58 million to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations.
In other models, the electroweak epoch is said to begin after the inflationary epoch ended, at roughly 10 −32 seconds. According to traditional Big Bang cosmology, the electroweak epoch began 10 −36 seconds after the Big Bang, when the temperature of the universe was low enough (10 28 K) for the electronuclear force to begin to manifest as ...
c. 10 −43 seconds: Grand unification epoch begins: While still at an infinitesimal size, the universe cools down to 10 32 kelvin. Gravity separates and begins operating on the universe—the remaining fundamental forces stabilize into the electronuclear force, also known as the Grand Unified Force or Grand Unified Theory (GUT), mediated by (the hypothetical) X and Y bosons which allow early ...
The 10th millennium BC spanned the years 10,000 BC to 9001 BC (c. 12 ka to c. 11 ka). It marks the beginning of the transition from the Palaeolithic to the Neolithic via the interim Mesolithic (Northern Europe and Western Europe) and Epipaleolithic (Levant and Near East) periods, which together form the first part of the Holocene epoch that is generally believed to have begun c. 9700 BC (c. 11 ...
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series.
Under current cosmological models, all matter created in the Big Bang was mostly hydrogen (75%) and helium (25%), with only a very tiny fraction consisting of other light elements such as lithium and beryllium. [8]
1 0 5 1 59 François Cevert France 1970–1973: 0 47 46 0 1 13 2 89 Eugène Chaboud France 1950–1951: 0 3 3 0 0 0 0 1 Jay Chamberlain United States 1962: 0 3 1 0 0 0 0 0 Karun Chandhok India 2010–2011: 0 11 11 0 0 0 0 0 Alain de Changy Belgium 1959: 0 1 0 0 0 0 0 0 Colin Chapman United Kingdom 1956: 0 1 0 0 0 0 0 0 Dave Charlton South Africa