Complex sentence: Researchers suggest that at least some of the tales of horned hares were inspired by sightings of rabbits infected with the "Shope papilloma virus", which causes horn-and antler-like tumors to grow in various places on a rabbit's head and body.
Split into simpler sentences: Researchers suggest that at least some of the tales of horned hares were inspired by sightings of rabbits infected with the "Shope papilloma virus". It causes horn-and antler-like tumors to grow in various places on a rabbit's head and body.