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Carbon (6 C) has 14 known isotopes, from 8 C to 20 C as well as 22 C, of which 12 C and 13 C are stable.The longest-lived radioisotope is 14 C, with a half-life of 5.70(3) × 10 3 years. . This is also the only carbon radioisotope found in nature, as trace quantities are formed cosmogenically by the reactio
Life restoration of Sarcosuchus imperator. Sarcosuchus is a distant relative of living crocodilians, with fully grown individuals estimated to have reached up to 9 to 9.5 m (29.5 to 31.2 ft) in total length and 3.45 to 4.3 metric tons (3.80 to 4.74 short tons) in weight. [2]
The only human fossils found before the discovery of Java Man in the 1890s were either of anatomically modern humans or of Neanderthals that were too close, especially in the critical characteristic of cranial capacity, to modern humans for them to be convincing intermediates between humans and other primates. [108]
The Isle of Portland is a tied island, 6 kilometres (4 mi) long by 2.7 kilometres (1.7 mi) wide, in the English Channel. [2] The southern tip, Portland Bill, lies 8 kilometres (5 mi) south of the resort of Weymouth, forming the southernmost point of the county of Dorset, England.
Over 7,000 artifacts (including stone tools and animal bone fossils) have been unearthed here, representing what has been dubbed the Xiaonanhai culture. [7] [citation needed] Around 2000 BC, the legendary sage-kings Zhuanxu and Emperor Ku are said to have established their capitals in the area around modern Anyang from where they ruled their ...
Grand Teton National Park is a national park of the United States in northwestern Wyoming.At approximately 310,000 acres (1,300 km 2), the park includes the major peaks of the 40-mile-long (64 km) Teton Range as well as most of the northern sections of the valley known as Jackson Hole.
The Tian Shan, [note 1] also known as the Tengri Tagh [1] or Tengir-Too, [2] meaning the "Mountains of God/Heaven", is a large system of mountain ranges in Central Asia.The highest peak is at the Jengish Chokusu at 7,439 metres (24,406 ft) high.
Modena (UK: / ˈ m ɒ d ɪ n ə /, [3] US: / ˈ m oʊ d-/; [4] [5] Italian: [ˈmɔːdena] ⓘ; Modenese: Mòdna; Etruscan: Mutna; Latin: Mutina) is a city and comune (municipality) on the south side of the Po Valley, in the Province of Modena, in the Emilia-Romagna region of northern Italy.