Time Perception

Time perception, or chronoception, is the subjective experience of time, measured by how an individual perceives the duration of events. This concept includes the perceived duration between two events. While it's impossible to directly experience another person's sense of time, scientific experiments, including temporal illusions, help explore the neural mechanisms behind time perception.
#6 Actually a really cool list
#19 I remember when I first found out that the Roman statues used to be paint to make them appear lifelike. Creepy.