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1 dzień temu · Enrico Fermi (Los Alamos 1945) The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life and the apparently high likelihood of its existence. As a 2015 article put it, "If life is so easy, someone from somewhere must have come calling by now." Italian-American physicist Enrico Fermi's name is associated with the paradox because of a casual ...
1 godzinę temu · The Sun is the star at the center of the Solar System.It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies. It is by far the most important source of energy for life on Earth. ...
1 dzień temu · Arizona (/ ˌ ær ɪ ˈ z oʊ n ə / ⓘ ARR-ih-ZOH-nə; Navajo: Hoozdo Hahoodzo [hoː˥z̥to˩ ha˩hoː˩tso˩]; O'odham: Alĭ ṣonak [ˈaɭi̥ ˈʂɔnak]) is a landlocked state in the Southwestern region of the United States.Arizona is part of the Four Corners region with Utah to the north, Colorado to the northeast, and New Mexico to the east; its other neighboring states are Nevada to the ...
1 dzień temu · Pennsylvania (/ ˌ p ɛ n s ɪ l ˈ v eɪ n i ə / ⓘ, lit. ' Penn's forest country '), officially the Commonwealth of Pennsylvania (Pennsylvania Dutch: Pennsylvanie), is a landlocked state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States.Pennsylvania borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest ...
1 dzień temu · Cattle (Bos taurus) are large, domesticated, bovid ungulates widely kept as livestock.They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus Bos.Mature female cattle are called cows and mature male cattle are bulls.Young female cattle are called heifers, young male cattle are oxen or bullocks, and castrated male cattle are known as steers.
1 dzień temu · The green sea turtle (Chelonia mydas), also known as the green turtle, black (sea) turtle or Pacific green turtle, is a species of large sea turtle of the family Cheloniidae.It is the only species in the genus Chelonia. Its range extends throughout tropical and subtropical seas around the world, with two distinct populations in the Atlantic and Pacific Oceans, but it is also found in the ...
