News

  1. Science & Society

    Cancer studies get mixed grades on redo tests

    Replications of cancer studies fail to reproduce some results.

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  2. Climate

    For three years in a row, Earth breaks heat record

    Spurred by climate change and heat from a strong El Niño, 2016 was the hottest year on record.

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  3. Earth

    Coastal waters were an oxygen oasis 2.3 billion years ago

    Coastal waters contained enough oxygen to support complex life-forms including some animals hundreds of millions of years before fossils of such life first appear.

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  4. Climate

    Petrified tree rings tell ancient tale of sun’s behavior

    The 11-year cycle of solar activity may have been around for at least 290 million years, ancient tree rings suggest.