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The lighthouse at Agate Bay, Two Harbors, Minnesota. By Lorie Shaull, CC BY-SA 2.0, https://creativecommons.org/licenses/by-sa/2.0/, via Wikimedia Commons
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© Jen Plunket. Used with permission
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Waves crashing into basaltic rocks formed from lava flows on Hawai'i Island. Courtesy of pxhere.com
