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EarthUnder 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.
By Sid Perkins -
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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AnimalsMeat-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.