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  1. Earth

    Excreted Drugs: Something Looks Fishy

    Drugs that the body can't fully use enter waste water, where they may affect aquatic life—or wind up in tap water.

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  2. Tech

    Satellite links may don quantum cloaks

    A theoretically foolproof scheme to shield secrets via the laws of quantum mechanics demonstrates its readiness to take on Earth-satellite communications.

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  3. Health & Medicine

    Common antibiotic may cure river blindness

    Tests in cows suggest that tetracycline might kill the tiny worm that spreads river blindness, a disease that infects about 18 million people.

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  4. Archaeology

    Neandertals’ diet put meat in their bones

    Chemical analyses of Neandertals' bones portray these ancient Europeans as skillful hunters and avid meat eaters, countering a theory that they mainly scavenged scraps of meat from abandoned carcasses.