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  1. Earth

    Under Pressure: High-stress tests show surprising change in a mantle mineral’s behavior

    Compressing a common iron-bearing mineral to the pressures found deep within Earth makes the material much stiffer, which might explain why seismic waves travel particularly fast through some zones of rock.

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  2. Bacterial Snitch: Species competes by telling on another

    A bacterial species that typically colonizes people's noses may win out over another bacterium by tattling to the host's immune system.

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  3. Animals

    Meat-Eating Caterpillar: It hunts snails and ties them down

    A newly named species of Hawaiian caterpillar sneaks up on a resting snail and quickly spins silk strands around it, lashing it to the spot, and then eats it.