Modern Marvels-Polio Vaccine

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Next - Modern Marvels-Stock Exchange - Undeniably essential to modern life, the telephone is the mostimportant, influential, and effective communication tool everdeveloped. Witness this invention's unbelivably dramatic story- one of false starts, close calls, and a bitter rivalry. 

Previous - Modern Marvels-Monster Trucks - Hear from bob chandler, the 'father' of this crowd-pleasingmotorsport and the builder of the legendary 'bigfoot'.