Simplify the following text for a Grade 11 native English-speaking person.
Original: These findings revolutionized contemporary knowledge of chimpanzee behavior , and were further evidence of the social similarities between humans and chimpanzees , albeit in a much darker manner .
Simplified: These findings revolutionized our knowledge of chimpanzee behavior . They were further evidence of the social similarities between humans and chimpanzees , albeit in a much darker manner .