Artistic rendering of a DNA strand with particle effects against a dark background.

Mutation Is Evolution’s Raw Material

Mutations are changes in DNA and the main source of genetic variation in all organisms. Without variation, evolution cannot shift a population.

Mutation and New Genes

The common garter snake has evolved resistance to the defensive substance tetrodotoxin in its amphibian prey.

Most Mutations Are Not Superpowers

Many mutations are either harmful or have no effect at all. Only a small number give an advantage.

Mutation and New Genes

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