Peggy, the 55-year-old chimpanzee at John Ball Zoo, died after a steep health decline, the zoo said in a Jan. 29 Facebook post. She defied life expectancy odds for most female chi ...
“You can't get the chimps to spit in a tube and send it off to 23 and Me," said Arizona State University professor and study co-author Kevin Langergraber. He says the team found genetic differences ...