Article: Garter snakes, newts in genetic war

For years, scientists at Utah State University have been documenting a "chemical arms race" between normally toxic newts and the garter snakes that eat them. Now they have discovered the genetic changes that allow the snakes to evolve molecular defenses against the poison.

Garter snakes regularly do something you can't -- something that perhaps no other creature but the snakes can do -- eat a rough- skinned newt and live. A newt is a member of the salamander order, and rough-skinned newts are common in West Coast streams.

As garter snakes have raised their chemical defenses, the newts have become more deadly. According to USU, one newt (scientific name Taricha granulosa) carries enough ...

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