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Search is on for missing pieces in puzzle of male genital diversity

Subtle female shapes and even highway planning could affect evolution

walrus

WILD ANATOMY  The much-discussed question of why male animals (walrus shown) can differ so much in genital anatomy could use some fresh approaches.

Joel Garlich Miller, U.S. Fish and Wildlife Service/ Wikimedia Commons

By Susan Milius

- More than 2 years ago

PORTLAND, Ore. — Crazily diverse shapes of male genitals across the animal kingdom — from curlicues and Y-tubes to multiknobbed, tendrilly whazzits — may evolve faster than any other animal structures.