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Featured Article: Cosmic microwave background radiation
In cosmology, the cosmic microwave background radiation (relic radition) is a form of electromagnetic radiation filling the universe. In simple terms, when looking at the sky with a radio telescope, the space between the stars and galaxies is not black. Instead there is a very faint glow, almost exactly the same in all directions, not coming from any star or galaxy. This glow is strongest in the microwave region of the radio spectrum, hence the name cosmic microwave background radiation. The name relic radiation comes from the leading theory to explain this radiation, which holds it is left over from the early universe.
Popular Article: Federalist No. 9
Federalist No. 9, titled "The Union as a Safeguard Against Domestic Faction and Insurrection", is a political essay by Alexander Hamilton and the ninth of The Federalist Papers. It was first published in the New York Daily Advertiser and the Independent Journal on November 21, 1787, under the pseudonym used for all Federalist Papers, Publius. The essay argues that large republics do not inevitably lead to tyranny as his opponents believed. It introduced the problem of factions that was famously the topic of Federalist No. 10, the most influential in the series.
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Social psychology developed as a field separate from the behavioral and psychoanalytic schools that were dominant at the time (source: Social psychology)
