The concept of mortality once thought to be solely human, is now understood to permeate the animal kingdom. Animals from chimpanzees to elephants to dogs exhibit reactions to the death of their kin that are eerily familiar to our expressions of grief.

Elephants, known for their profound social bonds, mourn the loss of their herd members in an unmistakably human-like manner. They may touch the deceased's body, trumpet loudly, and walk slowly, often seeking comfort in the presence of other elephants.

Similarly, dogs display grief and change behavior when they lose their owners. They exhibit signs of grief, such as sadness, separation anxiety, and changes in eating and sleeping habits. 

Although different in their complexity and manifestation, these reactions underscore the profound impact that the experience of death can have on a sentient being.