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micrograph of mouse's optic nerve

NERVE PROTECTORS  The glowing cells in this micrograph of a mouse’s optic nerve help shield electrical signals passing between eyes and brain. The Brainbow technique allows scientists to visualize how the cells work together.


SHRIVELED  Tumors implanted in adult female fruit flies cause healthy ovaries (one shown, left) to waste away. The wasting (right) is caused by a protein secreted by cancer cells. The bar shown represents 500 micrometers.

chili peppers

HOT STUFF  Capsaicin, the stuff that gives chili peppers their heat, relieves pain by a previously unknown process.

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