Evolution | Science News



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two northern quolls

UNAFRAID  Conservationists isolated a population of northern quolls, such as these pictured, on a predator-free island to attempt to build back their numbers. After 13 generations, the quolls lost their fear response to predators.

tetrapod illustration

SALTY SCENE  The planet’s earliest four-footed vertebrates called tetrapods (illustrated) lived in the brackish waters of an estuary or delta, new research suggests.

lizard-snake fossil

NEW OLDEST LIZARD  New details revealed by a CT scan helped identify a 240-million-year-old fossil called Megachirella wachtleri (shown) as the oldest known member of the lizard-snake lineage.

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