Life & Evolution

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river dolphin fossil skull and jaw

The skull and jaws of Isthminia panamensis, a new fossil dolphin from Panama, provides clues to the evolution of river dolphins in the Americas.  

jellyfish

The moderate sting from this Chrysaora pacifica jellyfish comes from a small number of stinging nematocysts that are long enough to penetrate the skin of its prey (or an accidental victim). More painful species have longer stingers and more of them, a new study finds.

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).

Life & Evolution

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