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Scientists Solve Century-Old Feline Mystery

August 21, 2026
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Animals often rely on scent marks to communicate identity across time, yet how chemically dynamic signals remain individually informative is unresolved; Ichizawa et al. show that domestic cats achieve durable chemical individuality through a reservoir-buffered system based on branched-chain fatty acid. Image credit: Ichizawa et al., doi: 10.1016/j.cub.2026.07.045.

For nearly 110 years, biologists have puzzled over why domestic cats’ kidneys are packed with unusually large numbers of fat-storing structures called lipid droplets.

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