Some dung beetle males face a touch choice--gonzo horns or big testes. When researchers cauterized the nascent prongs of immature Onthophagus nigriventris beetles, the insects grew testes that were 30 larger than those of unclipped males. (Shown above is a Proagoderus rangifer.) Bigger horns do not necessarily limit the growth of testes in the wild; the group found that some species of Onthophagus seem to protect their genital development to keep it from sinking below a minimum size. The result was published online recently in Proceedings of the National Academy of Sciences USA.