Snakes Vault Past Toxic Newts In Evolutionary Arms Race
 

Rough-skinned newts harbor in their skin massive doses of the same deadly toxin found in blowfish. Garter snakes that dine on the newts have evolved resistance to the toxin, spurring greater toxicity in the newts by natural selection. But now researchers report that in some areas, the snakes have somehow evolved levels of resistance far beyond what the newts are capable of countering.



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