Leaves of Grass Published / Mars Pathfinder landed on Mars - July 4

This Day in History Class - A podcast by iHeartPodcasts and HowStuffWorks

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Walt Witman's 'Leaves of Grass' was published on this day in 1855. / On this day in 1997, Mars Pathfinder landed on Mars. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.