Elephants are some of the most intelligent mammals on the planet and can therefore be trained to work and perform. However, their complex temperaments make training and handling them a challenge. Extensive studies place elephants in the category of great apes in terms of cognitive abilities for tool use and tool making, and their problem solving ability is considered equal to that of dolphins. Elephants are the only animals in the world known to have a ritual surrounding what event? Discuss
Source: The Free Dictionary