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.
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).
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.