A version of this article originally appeared onĀ Knowable Magazine
Sexual rivalries are how you evolve antlers, pincers, and tusks
Male-male competition makes animals "horny" as well
Kendall Powell writes about science from her home office in Lafayette, Colorado, a state full of weapon-wielding elk, moose, bighorn sheep and triceratops fossils.
Male-male competition makes animals "horny" as well