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  1. Particle Physics

    Excess antielectrons aren’t from nearby dead stars, study says

    Pulsars might not be behind excess antimatter, gamma-ray observations suggest.

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  2. Tech

    50 years ago, artificial limbs weren’t nearly as responsive

    Artificial limbs have come a long way since 1967.

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  3. Neuroscience

    Study casts doubt on whether adult brain’s memory-forming region makes new cells

    An examination of 54 human brains suggests that adults don’t grow new neurons in the hippocampus, contrary to several widely accepted studies.

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  4. Health & Medicine

    How dad’s stress changes his sperm

    Stress may change sperm via packets of RNA in the epididymis, a mouse study suggests.