A tiny fish has shown signs of a remarkable level of intelligence in mirror test experiments, not only recognizing itself in the reflection but also using a piece of food to explore how the mirror works. Mirror mark tests are a standard scientific experiment used to explore animal self-recognition, gauging how similar other species' intelligence might be to our own . Fixing your smudged eyeliner on seeing your reflection is a clear sign of self-recognition. Y ou know the smudge on your face is