Scientists Announce the First Clear Evidence of a Chimpanzee 'Civil War'

Scientists observed the largest known group of wild chimpanzees in Uganda fighting each other.

The community split into two hostile groups over time.

The evidence is based on more than 30 years of field observations.

Chimpanzees that once lived, ate, groomed, and patrolled together later became lethal rivals.

Aaron Sandel led the study; a 36-year-old male named Basie was killed in a 2019 attack.