Normally, they are friends. They roam around the park freely together. But they fought bitterly one day. Two gorillas in a British zoo have pounced on each other and one of them even badly bruised. Do you know the reason why they fought? Just for a piece of boiled potato. A 33-year-old gorilla and a fifteen-year one have wrestled with each other for well over a hour giving the onlookers a thorough enjoyment.
