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a side view drawing of a microscope with parts labeled. From "The Brain in Space" produced by NASA and stated as PD. svg nasa public domain Microscope With Labels
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a drawing of a writing pen. From "The Brain in Space" produced by NASA and stated as PD. svg nasa public domain Pen
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a drawing of the International Space Station from a NASA activity book. space station svg nasa International Space Station
a side view drawing of a microscope with parts labeled. From "The Brain in Space" produced by NASA and stated as PD. svg nasa public domain Microscope With Labels
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