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7th millennium BC · 7000–6001 BC. 6th millennium BC · 6000–5001 BC. 5th millennium BC · 5000–4001 BC. 4th millennium BC · 4000–3001 BC. 40th century BC. 39th century BC. 38th century BC. 37th century BC. 36th century BC.
10 times the length of the previous cosmological decade, with CD 1 beginning either 10 seconds or 10 years after the Big Bang, depending on the definition. eon: 10 9 yr: Also refers to an indefinite period of time, otherwise is 1,000,000,000 years. kalpa: 4.32 × 10 9 yr: Used in Hindu mythology. About 4,320,000,000 years. exasecond: 10 18 s
An order of magnitude of time is usually a decimal prefix or decimal order-of-magnitude quantity together with a base unit of time, like a microsecond or a million years. In some cases, the order of magnitude may be implied (usually 1), like a "second" or "year". In other cases, the quantity name implies the base unit, like "century".
General periods. Geologic Time – Period prior to humans. 4.6 billion to 3 million years ago. (See "prehistoric periods" for more detail into this.) Primatomorphid Era – Period prior to the existence of Primatomorpha. Simian Era – Period prior to the existence of Simiiformes. Hominoid Era – Period prior to the existence of Hominoidea.
This recession was one of the main causes of the American Civil War, which would begin in 1861 and end in 1865. This is the earliest recession to which the NBER assigns specific months (rather than years) for the peak and trough. [ 6][ 8][ 21] 1860–1861 recession. October 1860 – June 1861. 8 months.
Century-old Bible reunited with original owners' family after more than 50 years. Gannett. ... than a century old will soon be in the hands ... race for 5th time and 4th in 5 years. Weather.
Latin terms for anniversaries are mostly straightforward, particularly those relating to the first thirty years (1–30), or multiples of ten years (30, 40, 50, 60, 70 etc.), or multiples of centuries or millenniums (100, 200, 300, 1000, 2000, 3000, etc.).
According to the strict construction, the 1st century AD, which began with AD 1, ended with AD 100, and the 2nd century with AD 200; [note 1] in this model, the n-th century starts with a year that follows a year with a multiple of 100 (except the first century as it began after the year 1 BC) and ends with the next coming year with a multiple ...