November 19, 1990 12:00 PM

>Invention (Tuesdays, 9:30 P.M. ET) is the Discovery Channel’s video magazine, profiling tinkerers and true innovators, past and present. Hosted by Lucky Severson, it’s a viewer-friendly tribute to human ingenuity and problem solving. PBS’s Scientific American Frontiers series is similar but more eclectic. (It encompasses, for instance, zoology.) This month’s installment (Wed., Nov. 14, 8 P.M. ET) features a lively motorized design competition among MIT engineering students, an annual contest originated by your host, Woodie Flowers.

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