The Manjanggul Lava Tube, South Korea

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A sunset on Mars.

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Salt and pepper under a microscope.

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Tarantula Nebula

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The eye of a giant squid.

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Fossilized sloth dung found in a cave in the Grand Canyon, 1938

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Used dental floss on the microscopic level.

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Galileo Galilei [sometime before 1642] by Domenico Passignano

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Albert Einstein’s Pipe, about 1948

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Star chart by Su Song from around 1020 to 1101 CE.

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Fossilized giant sloth poop, from the Pleistocene Epoch (This exact poop is about 100,000 years old).

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Balsamodendron ehrenbergianum, drawn in 1881.

Manna Ash (Fraxinus ornus), 1897

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Seyfert’s Sextet

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M1-67