科技与人工智能
Special agents' blood and urine test results stolen in FBI hack
Experts say the hack could leave agents vulnerable to scams, blackmail and targeted attacks.
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科学与环境
Scientists discover a hidden “ID card” in cat urine
Cats may identify one another through a surprisingly durable chemical “calling card” made from 13 unusual fatty acids in their urine. The compounds appear linked to mysterious fat droplets in the kidneys and may represent a scent-recognition system shared across the cat family.
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