GRAND RAPIDS, Mich. (WOOD) — Peggy, John Ball Zoo’s 55-year-old female chimpanzee, has died, the zoo announced Wednesday. According to the zoo, team members had recently noticed a ...

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 chimpanzees.

In Greek mythology, a chimera is a grotesque hybrid. But chimeras are not just tales. Here's how some scientists have been ...