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Conservation in the United States can be traced back to the 19th century with the formation of the first National Park. Conservation generally refers to the act of consciously and efficiently using land and/or its natural resources. This can be in the form of setting aside tracts of land for protection from hunting or urban development, or it ...
In biological phylogenetics, a clade (from Ancient Greek κλάδος (kládos) 'branch'), also known as a monophyletic group or natural group, [1] is a grouping of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. [2] In the taxonomical literature, sometimes ...
Black and white tables of natural history, from Ephraim Chambers's 1728 Cyclopaedia.. Natural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study.
Notable students. Thomas Perkins Abernethy. Merle Curti. Frederick Jackson Turner (November 14, 1861 – March 14, 1932) was an American historian during the early 20th century, based at the University of Wisconsin-Madison until 1910, and then Harvard University. He was known primarily for his frontier thesis.
Flat roof in Warszawa Centralna railway station in Poland (1975) A flat roof is a roof which is almost level in contrast to the many types of sloped roofs. The slope of a roof is properly known as its pitch and flat roofs have up to approximately 10°. [1] Flat roofs are an ancient form mostly used in arid climates and allow the roof space to ...
Coffer. A coffer (or coffering) in architecture is a series of sunken panels in the shape of a square, rectangle, or octagon in a ceiling, soffit or vault. [1] A series of these sunken panels was often used as decoration for a ceiling or a vault, also called caissons ("boxes"), or lacunaria ("spaces, openings"), [2] so that a coffered ceiling ...
Cryobiology is the branch of biology that studies the effects of low temperatures on living things within Earth's cryosphere or in science. The word cryobiology is derived from the Greek words κρῧος [kryos], "cold", βίος [bios], "life", and λόγος [logos], "word". In practice, cryobiology is the study of biological material or ...
Macroevolution addresses the evolution of species and higher taxonomic groups (genera, families, orders, etc) and uses evidence from phylogenetics, [ 5 ] the fossil record, [ 9 ] and molecular biology to answer how different taxonomic groups exhibit different species diversity and/or morphological disparity. [ 12 ]