Life & Evolution

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SAVE OUR SALAMANDERS  North American biologists hope a new import ban — and help from citizen scientists — will defend the continent’s extraordinary diversity of salamanders, like this Ensatina salamander, from deadly Bsal fungus.


OPEN CONCEPT A hut in the jungle village of Checherta has no walls and is open to the outdoors, letting environmental bacteria live inside. More urban dwellings tend to have bacteria that come from humans.

The larvae of Diamphidia nigroornata beetles produce a toxin that Ju|'hoan hunters collect for poison arrows.

Life & Evolution

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