Protecting worlds like Earth and Mars from microscopic invaders carried by human and robot visitors was just one of the scores of topics covered at this year’s Humans to Mars summit. Mat Kaplan moderated a panel featuring planetary scientist and New Horizons mission principal investigator Alan Stern, NASA associate administrator Mike Gold, and NASA planetary protection officer Lisa Pratt. Planetary Society digital editor Jason Davis shares the fascinating 40-year timeline that can be found in the Society’s September equinox edition of The Planetary Report, and Mars shines bright in our What’s Up segment. Great links and more are at https://www.planetary.org/planetary-radio/1007-2020-h2m-planetary-protection-panel

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