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  1. Positive Signal: Lone protons carry messages between cells

    In roundworms, protons carry signals from cells in the intestine to muscle cells, raising the possibility that protons might act as neurotransmitters in mammal brains.

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  2. Seeing Again: Blind fish parents have fry that see

    Cross two strains of blind cavefish that have lived in the dark for a million years, and some of their offspring will be able to see.

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  3. Astronomy

    Heavy Find: Weighty neutron stars may rule out exotic core

    Neutron stars may be the weirdest stars in the universe, but they don't seem to be very strange, a weighty new report finds.

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  4. 19915

    This article says that the companion star of the pulsar PSR B1516+02B must be “tiny” because it cannot be seen.