Elephants are largely known for their ivory, enormous size, and extensive memories. This article discusses the structure of the elephant brain and how elephant society functions. Here’s an excerpt:

“The elephant has one of the most closely knit societies of any living species. Elephant families can only be separated by death or capture. Cynthia Moss, an ethologist specialising in elephants, recalls an event involving a family of African elephants. Two members of the family were shot by poachers, who were subsequently chased off by the remaining elephants. Although one of the elephants died, the other, named Tina, remained standing but with knees beginning to give way. Two family members, Trista and Teresia (Tina’s mother) walked to both sides of Tina and leaned in to hold her up. Eventually, Tina grew so weak she fell to the ground and died. However, Trista and Teresia did not give up but continually tried to lift her. They managed to get Tina into a sitting position, but her body was lifeless and fell to the ground again. As the other elephant family members became more intensely involved in the aid, they tried to put grass into Tina’s mouth. Teresia then put her tusks beneath Tina’s head and front quarters and proceeded to lift her. As she did so, her right tusk broke completely off, right up to the lip and nerve cavity. The elephants gave up trying to lift Tina but didn’t leave her; instead, they began to bury her in a shallow grave and throw leaves over her body. They stood over Tina for the night, and then began to leave in the morning. The last to leave was Teresia.”

Elephant Intelligence