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Genes & 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.

sweet potatoes

HOW SWEET  Long before humans inhabited Polynesia, sweet potatoes may have been carried across the ocean from South America to the South Pacific islands by wind, water or maybe even birds.

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.

Genes & Cells

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