Jack Challoner, Gills of a fish-like invertebrate (all images courtesy Jack Challoner, from ‘The Cell: A Visual Tour of the Building Block of Life‘) In 1665, when British polymathic scientist Robert ...
Colorized scanning electron micrographs of a B and T lymphocyte shown with a fluorescent microscopy image of the previously unseen "X lymphocyte," which is a hybrid of the other two immune cells.
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