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b"Why do fireflies flash their lights on and off, on and off? That\\u2019s what four curious kids want to know. Biologist Sara Lewis has studied fireflies for decades, and she\\u2019s cracked the code of their spectacular light displays. She explains why fireflies light up at night with a story of an undercover experiment. Sara tells us how she \\u201cspoke firefly\\u201d and learned that female fireflies are surprisingly hard to please. To learn more about fireflies, see Sara\\u2019s website and book at www.silentsparks.com. We're proud that Tumble is a free podcast! But we need your support to keep it going and growing. We\\u2019ve launched a Patreon campaign to offer you awesome rewards in exchange for a monthly pledge! Find out what our next episode is about in advance, get notified of opportunities to be on the show, receive exclusive educational content and so much more. Find the link on our website, www.tumblepodcast.com. Subscribe and review Tumble on iTunes, like us on Facebook, and follow us on Twitter. We want to hear from you at tumblepodcast@gmail.com. Firefly photo by Terry Priest used with permission from Sara Lewis."