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Cells

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norovirus in mouse tissue

THE WINNER IS…  In mice, norovirus invades tuft cells (the two bright green spots) in the lining of the small intestine (left) and the colon (right). Other cells in the intestines that weren’t infected (blue) are also shown.

nerve cells in hippocampi

NEURON NURSERY  Roughly the same number of new nerve cells (dots) exist in the hippocampus of people in their 20s (three hippocampi shown, top row) as in people in their 70s (bottom). Blue marks the dentate gyrus, where new nerve cells are born.

close-up of an eye

BABY BLUE  Using human eye cells, researchers fashioned an artificial eye surface that could be used to study and test treatments for eye diseases.

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