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Body & Brain

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mouse microglia

GUT IMPULSE Signals from gut microbes can activate immune cells called microglia (shown here in green) in the mouse brain, causing inflammation that’s characteristic of Parkinson’s disease.

needle with spindle and egg

BATTERY SWAP A technique to suck a chromosome-containing structure called the spindle (white, in needle) out of a mother’s egg and place it in a donor egg emptied of its chromosomes but with healthy mitochondria can help prevent mitochondrial diseases.

cat with abacus

NUMBER SMARTS  Cats show quantity-­related abilities. Without training, cats can pick out differences between groups of a few small objects, such as 2 versus 5, but the felines may be using visual shortcuts.

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