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Chimpanzee group aggression against alpha male (UPDATED)
Violent chimpanzee attack - Planet Earth - BBC wildlife
Chimps are naturally violent, study suggests | Live Science
Bad boys: Study finds aggressive bonobo males attract more mates - Phys.org
Bonobos, the ‘hippie chimps,’ might not be so mellow after all
Why do chimps kill each other? | Science - AAAS
Gorilla vs. Chimpanzee: Who Wins in Their Battle and Why Do They Fight …
Why Are Chimpanzees and Gorillas Suddenly Going to War?
Aggression in male chimpanzees leads to mating success
Male Bonobos, Close Human Relatives Long Thought to Be …