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In 1781, Immanuel Kant published the Critique of Pure Reason, one of the most influential works in the history of the philosophy of space and time. He describes time as an a priori notion that, together with other a priori notions such as space, allows us to comprehend sense experience. Kant denies that either space or time are substance, entities in themselves, or learned by experience; he holds, rather, that both are elements of a systematic framework we use to structure our experience. Spatial measurements are used to quantify how far apart objects are, and temporal measurements are used to quantitatively compare the interval between (or duration of) events. Although space and time are held to be transcendentally ideal in this sense, they are also empirically realthat is, not mere illusions.

What did Kant describe time as?
Answer: a priori notion
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Proto-Slavic, the supposed ancestor language of all Slavic languages, is a descendant of common Proto-Indo-European, via a Balto-Slavic stage in which it developed numerous lexical and morphophonological isoglosses with the Baltic languages. In the framework of the Kurgan hypothesis, "the Indo-Europeans who remained after the migrations [from the steppe] became speakers of Balto-Slavic".

Proto-Slavic is a descendant of what?
Answer: Proto-Indo-European
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Northwestern's Evanston campus, where the undergraduate schools, the Graduate School, and the Kellogg School of Management are located, runs north-south from Lincoln Avenue to Clark Street west of Lake Michigan along Sheridan Road. North and South Campuses have noticeably different atmospheres, owing to the predominance of Science and Athletics in the one and Humanities and Arts in the other. North Campus is home to the fraternity quads, the Henry Crown Sports Pavilion and Norris Aquatics Center and other athletic facilities, the Technological Institute, Dearborn Observatory, and other science-related buildings including Patrick G. and Shirley W. Ryan Hall for Nanofabrication and Molecular Self-Assembly, and the Ford Motor Company Engineering Design Center. South Campus is home to the University's humanities buildings, Pick-Staiger Concert Hall and other music buildings, the Mary and Leigh Block Museum of Art, and the sorority quads. In the 1960s, the University created an additional 84 acres (34.0 ha) by means of a lakefill in Lake Michigan. Among some of the buildings located on these broad new acres are University Library, Norris University Center (the student union), and Pick-Staiger Concert Hall.

What is noticably different between Northwestern's North and South Campuses?
Answer:
atmospheres