1961 introductions

probabilistic argument to estimate the number of alien civilizations in our galaxy

space travel with humans aboard spacecraft

military herbicide

personality model consisting of five broad dimensions of personality

thumb|East German '''''' (; literally 'little traffic light man', diminutive of '''''' ) is the symbol shown on pedestrian signals in Germany. Prior to German reunification in 1990, the two German states had different forms of the pedestrian traffic lights, with a generic human figure in West Germany, and a generally "male" figure wearing a hat in the East.

Fenethylline (BAN, USAN) or fenetylline (INN) is a codrug of amphetamine and theophylline and so a mutual prodrug of both. It is also spelled phenethylline; other names for it are amphetaminoethyltheophylline and amfetyline. The drug was marketed for use as a psychostimulant under the brand names Captagon, Biocapton, and Fitton. The brand name "Captagon" (or in lowercase as "captagon") is often used generically to describe illicitly produced fenethylline.

field goal in a basketball game made from beyond the three-point line, a designated arc surrounding the basket

plan for economic cooperation between the USA and Latin America

paradox arising from an incorrect proof by mathematical induction

Polywater was a hypothesized polymerized form of water that was the subject of much scientific controversy during the late 1960s, first described by Soviet scientist Nikolai Fedyakin. By 1969 the popular press had taken notice of Western attempts to recreate the substance and sparked fears of a "polywater gap" between the United States and Soviet Union. Increased press attention also brought with it increased scientific attention, and as early as 1970 doubts about its authenticity were being circulated. By 1973 it was found to be illusory, being just water with any number of common compounds c

class of formal systems modelled visually by equal-sized squares with a color on each edge which can be arranged side by side

explanation of how an attitude or belief can be protected against influence in much the same way a body can be protected against disease

bicameral right-to-left abjad, sometimes used to transcribe from the Wolof language

Suzuki FB/FE/L50/LJ50/T5A/T5B family of engines