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  1. Tumor Tell-All

    Unraveling complex genetic stories in cancer cells may lead to personalized treatment.

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  2. Space

    Super-Earths may come in two flavors

    As more exoplanets are discovered, evidence emerges that worlds can be either fluffy or dense.

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  3. Humans

    Fossil finds offer close look at a contested ancestor

    Nearly 2 million-year-old fossils offer glimpses of a species that may, or may not, have been crucial for human evolution.

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  4. Health & Medicine

    Body & Brain

    Vaccine knocks down diarrhea cases, a flag for mortality risk and more in this week’s news.

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  5. Earth

    Earthly riches heaven sent

    A period of heavy meteorite bombardment after Earth's formation may have peppered Earth's outer layers with useful metals.