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Innovation and Invention: NIH and Prosthetic Heart Valves

This exhibition describes the discoveries that led to the heart-lung machine and open heart surgery, the number of experimental replacement valves that were invented and implanted, the role that NIH played in the 1960s and 70s in developing and testing these medical devices, and the public safety and regulatory responsibilities that were entrusted to the FDA.

Visit the Site

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Siemens 1-A Electron Microscope

This Siemens 1-A Electron Microscope was used for over three decades by Dr. Albert Kapikian, NIAID.  The instrument was used to detect and characterize various viruses. 

See the Siemens Microscope at its exhibit site located in Building 50.


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Charles Darwin
Photograph of Charles Darwin

Formally titled “Rewriting the Book of Nature: Charles Darwin and the Rise of Evolutionary Theory,” the exhibit describes the Charles Darwin’s life and the fortunes of the theory of evolution by natural selection.Charles Darwin Website

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