Why does the scientific classification of vipers occasionally change?

Answer

New molecular and genetic data

Taxonomy is a dynamic science, not a static one. While early classification was based heavily on morphological traits like skull structure and scale counts, modern science increasingly relies on genetic sequencing and molecular analysis. As researchers uncover new genetic information, they often find that traditional groupings do not reflect evolutionary reality, leading to revisions in genus and species classifications to more accurately represent true lineages.

Why does the scientific classification of vipers occasionally change?
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