The phenomenal new electron microscope (TIME, Dec. 14, 1942) has been taking a good long look at hitherto invisible objects. In the last two issues of the Journal of the American Medical Association, ...
Current calibration methods rely on artificially constructed DNA structures or specific cellular features, each with significant drawbacks. DNA-based rulers require complex chemical synthesis and only ...
Primitive peoples believed that evil spirits carried diseases. Hebrews and Greeks proved that cleanliness protected them from many ailments. In the Middle Ages doctors ascribed to various invisible ...
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