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Thirty Meter Telescope. The Thirty Meter Telescope (TMT) is a planned extremely large telescope (ELT) [5][6][7] proposed to be built on Mauna Kea, on the island of Hawai'i. The TMT would become the largest visible-light telescope on Mauna Kea. [8][9] Scientists have been considering ELTs since the mid 1980s. In 2000, astronomers considered the ...
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period. It includes brief explanations of the various taxonomic ranks in ...
This is a list of the tallest people, verified by Guinness World Records or other reliable sources. According to the Guinness World Records, the tallest human in recorded history was Robert Wadlow of the United States (1918–1940), who was 272 cm (8 ft 11 in). He received media attention in 1939 when he was measured to be the tallest man in ...
Absolute magnitude is defined as the apparent magnitude that a star or object would have if it were observed from a distance of 10 parsecs (33 light-years; 3.1 × 10 14 kilometres; 1.9 × 10 14 miles). Therefore, it is of greater use in stellar astrophysics since it refers to a property of a star regardless of how close it is to Earth.
Fathom - the distance between the fingertips of a human's outstretched arms. Finger. Fistmele - the measure of a clenched hand with the thumb extended. Gradus - Ancient Roman step. Hand - breadth of a human hand. Klafter - German measure of outstretched hands. League - the distance a person can walk in an hour (by one definition)
Human taxonomy. is the classification of the human species (systematic name Homo sapiens, Latin: "wise man") within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans. Current humans have been designated as subspecies Homo sapiens sapiens ...
Human height measurement using a stadiometer. Human height or stature is the distance from the bottom of the feet to the top of the head in a human body, standing erect.It is measured using a stadiometer, [1] in centimetres when using the metric system or SI system, [2] [3] or feet and inches when using United States customary units or the imperial system.
According to a study in France, executives and professionals are 2.6 centimetres (1.0 in) taller, and university students are 2.55 centimetres (1.0 in) taller than the national average. [ 7 ] As this case shows, data taken from a particular social group may not represent a total population in some countries.