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  1. Earth

    Microbes put ancient carbon on the menu

    Scientists have found microorganisms within Kentucky shale that are eating the ancient carbon locked within the rock, a previously unrecognized dietary habit that could have a prevalent role in the weathering and erosion of similar sedimentary rock at many other locations.

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  2. Bacterial cells reveal skeletal structures

    The finding of a cytoskeleton in Bacillus subtilis bacteria eliminates a fundamental difference between bacteria and higher (eukaryotic) cells.

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  3. Earth

    Ancient tree rings reveal past climate

    Using tree-ring analysis, an international team of researchers has reconstructed the earliest record of annual climate variation.

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  4. Health & Medicine

    Urine tests can foretell bladder cancers

    U.S.