How do we measure the speed of light?

Daniel and Kelly welcome Dr. Scott Solomon back on the show to talk about his new book Becoming Martian: How Living in Space Will Change our Bodies and Minds.See omnystudio.com/listener for privacy information. 

Daniel and Kelly discuss Elon Musk's recent announcement that SpaceX has shifted focus from a self-sustaining settlement on Mars to a self-growing city on the Moon.See omnystudio.com/listener for privacy information. 

It's time for more listener mail! Let's dig in. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information. 

Save time and money by knowing how much you use

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Robert and Joe explore the origins and impact of roads... Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information. 

Since the invention of the automobile, car manufacturers and drivers have pushed the limits of technology toward one primary goal: speed. Learn more about the need for speed in this podcast from HowStuffWorks.