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<p>Even after the Apollo program put astronauts on the moon, Mars remained out of reach. Then, in 1990, an ambitious engineer hatched an ingenious plan to send the first humans to the red planet. But will anyone at NASA buy into his idea?</p><p>You can binge all episodes of American Innovations exclusively and ad-free on Wondery+. Find Wondery+ in the Wondery App or on Apple Podcasts.</p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.</p>