Reports and sightings of cottontail rabbit papillomavirus have been documented for centuries, but the symptoms have gone viral in a new sense this summer. Photos of wild rabbits with wart-like horns ...

Cottontail rabbits in Colorado have been spotted with "wart-like" growths on their faces. But don't worry — they're OK. Why it matters: The viral infection causing the horn-like growth spurts can come ...

Colorado Parks and Wildlife (CPW) said the black growths on the rabbits are from a viral infection caused by the cottontail rabbit papillomavirus Experts note that the growths often don't harm the ...

A group of rabbits in Colorado with grotesque, hornlike growths may seem straight out of a low-budget horror film, but scientists say there's no reason to be spooked — the furry creatures merely have ...