PBS Eons has a new episode.  This one is about horned rodents, more specifically horned gophers.  When originally described, they were likened to miniature rhinoceros.

These odd rodents belong to a genus known as Ceratogaulus, but they’re more commonly called horned gophers, because, you guessed it, they had horns. And it turns out the horns probably had a purpose – one that rodents would likely benefit from today.