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20 hours ago · Formaldehyde is an intermediate in the oxidation (or combustion) of methane, as well as of other carbon compounds, e.g. in forest fires, automobile exhaust, and tobacco smoke. When produced in the atmosphere by the action of sunlight and oxygen on atmospheric methane and other hydrocarbons, it becomes part of smog.
20 hours ago · The Roman empire under Hadrian (ruled 117–138), showing the location of the Iazyges in the plain of the Tisza river The Iazyges [a] were an ancient Sarmatian tribe that traveled westward in c. 200 BC from Central Asia to the steppes of modern Ukraine. In c. 44 BC, they moved into modern-day Hungary and Serbia near the Dacian steppe between the Danube and Tisza rivers, where they adopted a ...
20 hours ago · e. Eugenics ( / juːˈdʒɛnɪks / yoo-JEN-iks; from Ancient Greek εύ̃ (eû) 'good, well', and -γενής (genḗs) 'come into being, growing') [1] is a set of beliefs and practices that aim to improve the genetic quality of a human population. [2] [3] [4] Historically, eugenicists have attempted to alter human gene pools by excluding ...
