Mailbag: How Did Mars Form?

In this mailbag episode, Marshall and Lindsay tackle two great questions from listeners about rainbows and how Mars formed. Also, you'll get to hear about Marshall's trip to the Cambridge Science Carnival in Cambridge, MA, and as always your listener reviews. Help Tumble on our quest to 4.4 stars! Go here to leave a rating and review! Get Tumble merch at tumblepodcast.dashery.com Also join Marshall at his Kid Quiz / Science Question meetup by becoming a subscriber on Patreon at patreon.com/tumblepodcast