Diamond nanoparticles containing nitrogen-vacancy centers can now monitor cellular metabolism in real time, targeting ...

Electrically tunable ionic hydrogels use small voltages to switch friction at metal contacts between high-friction and ...

Fifty years after her death, the German-born political thinker has been enshrined as a prophet for our times. What did she actually say? By Jennifer Szalai Need the perfect holiday gift? Try one of ...

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Our columnist picks the year’s outstanding books. By Alida Becker What birders well know, fans of “composite organisms” and other creatures can now learn: how to identify obscure species in the wild.