Feature

  1. Earth

    Particular Problems

    Toxicologists and chemists are forging a new field called nanotoxicology as they grapple with assessing the safety of engineered nanoparticles.

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  2. Earth

    Buried Treasures

    Geologists have long understood the chemical processes that sculpt many cave formations, but they've only recently come up with a physical model that explains some of their shapes.

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  3. Health & Medicine

    Ultrasound’s New Focus

    No longer limiting the use of sound waves to diagnostic medicine, researchers are studying high-intensity focused ultrasound as a treatment for uterine fibroids, breast cancer, prostate cancer, and other cancers.

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  4. The Bias Finders

    A simple test of unconscious preferences has achieved great popularity among psychologists and, at the same time, sparked heated debate over how it works and whether it shows widespread implicit biases against black people.