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Read articles, including Science News stories written for ages 9-14, on the SNK website.
CELLULAR GAG REFLEX

Cells gobble up stuff in the body, but some objects make them choke. Researchers have found that when a long perpendicular fiber comes near (green), a cell (blue) senses only its tip, mistakes it for a sphere, and begins engulfing something too long to swallow. Credit: Huajian Gao Lab/Brown University

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