When Koko's death was announced, many news organisations, including the BBC, wrote headlines such as "Koko: Gorilla who mastered sign language" and "Koko, famed gorilla that learned sign language".

The death of a two-year-old gorilla at the Calgary Zoo on Nov. 12 was caused by human error, according to zoo officials. The cause of death of the young western lowland gorilla, named Eyare ...

A 2-year-old gorilla at Calgary Zoo died after a staff error caused head injuries. The zoo launched an investigation and tightened safety measures. The staff member ...