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(A) Howard casts a critical eye on a replica of the van Leeuwenhoek microscope. “Running and tumbling, little motor spins around. Howard sees them swim!” (Ariane Briegel wrote the haiku and provided the photo, which was taken by Eliza Wolfson [reproduced with permission].) (B) Howard with a slightly more complicated microscope. (Photo courtesy of Linda Turner, reproduced with permission.)
