Sly octopuses have a large brain. Suppose compared to your body weight, then your brain is smaller than the octopus, of course. They can recognize faces and show compassion for others.
There is only one animal in the animal kingdom that can laugh, which is the rat. Rats are also known to dream as we do. They communicate in the ultrasonic range with one another to avoid being prey. Scientists believe they possess a rich vocabulary they use in their communication.
Elephants are very vindictive because they have an excellent long-term memory. They are very familiar with the terrain, and they are familiar with how to use tools. Thick branches are “fly washers” for them. Elephants can empathize and relate to their tribespeople and get upset if they feel sad or die.