Life & Evolution

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ancient lava

MURDEROUS MAGMA  Gases coughed up by the Siberian Traps volcanic eruptions could have triggered the Permian extinction around 252 million years ago, new research demonstrates. Researchers measured the age of the eruptions by analyzing crystals embedded in ancient lavas (shown).

crown-of-thorns starfish

An outbreak of crown-of-thorns starfish (one shown) can devastate a reef. But algae, a coral competitor, may protect coral from the predatory starfish, a new study finds.

frog

CALLING CARD  Male túngara frogs like this one attract their mates with a series of chirpy croaks. When picking between two calls, females tend to prefer a lower tone and more quickly repeated calls, but adding in a third suitor with an unattractive song may change a female’s preference between the two other males.  

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