Out of hundreds of animals that have been tested Humans, Chimpanzees, and Orangutans are the only ones that are capable of being aware of ones self. Humans usually become self-aware between the ages 18 - 24 months. The mirror self-recognition test is how animals are tested whether or not they are self-aware. This test involves placing a little sticker on a child's face and seeing if they realize that the sticker is on their own face. If a child does not respond to the sticker they think that the sticker is on the face that is in the mirror and not their own. I have taken self-awareness for granted my whole life. How do we become self-aware when no other animals are? Now that I think more on self-awareness I am curious if there are different animals that can be self-aware and how exactly we become self-aware. Also I am curious about why we become self-aware at that exact time in our lives. The one disadvantage to self-awareness (or maybe advantage) is that with it comes death-awareness.