American Basin in southern Colorado's San Juan Mountains (© Blaine Harrington III/Alamy)

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Gray seal pup resting on a beach in Blakeney National Nature Reserve, England (© Kevin Sawford/Getty Images)

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Enhanced-color composite of the Caloris Basin, Mercury (© NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)

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Enhanced-color composite of the Caloris Basin, Mercury (© NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington)

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Tolbachik volcanic complex on the Kamchatka Peninsula, Russia (© Egor Vlasov/Shutterstock)

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Great Point Light on Nantucket Island, Massachusetts (© Cate Brown/Cavan Images)

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Independence Day fireworks over the National Mall, Washington, DC (© Jon Bilous/Shutterstock)

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