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AnimalsThreatened coral get fishy rescue
When toxic seaweed gets too close to this coral, gobies fight and bite back.
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ChemistryExplainer: Ocean acidification
Here’s why shellfish and other animals in the sea suffer when the ocean is forced to absorb too much carbon dioxide.
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PlanetsA diamond planet?
Distant, carbon-rich world could contain one-third its weight in gems that are relatively rare on Earth.
By Sid Perkins -
Health & MedicineHealthier mice, through X-rays
In sickly mice, small doses of radiation helped while vitamins harmed.
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ClimateThe high life
The sky is full of microscopic life, some of which might even trigger rain or snow.
By Douglas Fox -
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TechHow to stop a speeding bullet
Scientists take a close look at a plastic that has Superman’s ability to stop a speeding bullet.
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SpaceTwinkle, twinkle oldest stars
Astronomers find traces of ancient light in the activity of bright, distant galaxies.