Mars all-stars gathered online for September’s annual Humans to Mars summit produced by Explore Mars. Planetary Radio host Mat Kaplan moderated three intriguing panels with participants including leaders from space agencies throughout the world. Then we hear about the 19th century’s biggest telescope in this week’s What’s Up segment with Bruce Betts.  Learn more at https://www.planetary.org/planetary-radio/2021-humans-to-mars-summit-excerpts

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