Woolly rhino neck ribs provide clues about their decline and eventual extinction

A study reports on the incidence of abnormal cervical (neck) vertebrae in woolly rhinos, which strongly suggests a vulnerable condition in the species. Given the considerable birth defects that are associated with this condition, the researchers argue it is very possible that developmental abnormalities contributed towards the eventual extinction of these late Pleistocene rhinos.
Paleontology News — ScienceDaily