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1 day ago · Biodiversity is commonly measured in terms of taxonomic richness of a geographic area over a time interval. In order to calculate biodiversity, species evenness, species richness, and species diversity are to be obtained first. Species evenness [209] is the relative number of individuals of each species in a given area.
4 hours ago · Linearity. The Schrödinger equation is a linear differential equation, meaning that if two state vectors and are solutions, then so is any linear combination. of the two state vectors where a and b are any complex numbers. [13] : 25 Moreover, the sum can be extended for any number of state vectors.
1 day ago · Archaeopteryx ( / ˌɑːrkiːˈɒptərɪks /; lit. 'old-wing' ), sometimes referred to by its German name, " Urvogel " ( lit. Primeval Bird) is a genus of bird -like dinosaurs. The name derives from the ancient Greek ἀρχαῖος ( archaīos ), meaning "ancient", and πτέρυξ ( ptéryx ), meaning "feather" or "wing".
1 day ago · Karl Popper was born in Vienna (then in Austria-Hungary) in 1902 to upper-middle-class parents. All of Popper's grandparents were assimilated Jews; the Popper family converted to Lutheranism before he was born [13] [14] and so he received a Lutheran baptism. [15] [16] His father, Simon Siegmund Carl Popper (1856-1932), was a lawyer from Bohemia ...
4 hours ago · The human skull is used universally as a symbol of death. Death is the irreversible cessation of all biological functions that sustain a living organism. The remains of a former organism normally begin to decompose shortly after death. Death eventually and inevitably occurs in all organisms. Some organisms, such as Turritopsis dohrnii, are biologically immortal, however they can still die from ...
1 day ago · Africa. Africa is the world's second largest and second-most populous continent after Asia. At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth 's land area and 6% of its total surface area. [7] With 1.4 billion people [1] [2] as of 2021, it accounts for about 18% of the world's human ...
1 day ago · A historically influential theory says that intentionality is the mark of the mental. A state is intentional if it refers to or represents something. For example, if a person perceives a piano or thinks about it then the mental state is intentional because it refers to a piano. This view distinguishes between original and derivative intentionality.
