This is great and will not spoil too much but at the beginning of Prometheus the ship travels through space and all crew members are in cryo-sleep except for David the Android played by Fassbender because he doesn't have to. And when the ship reaches the planet they say they took more than 2 years to reach it. And all that time David has spent watching movies like Lawrence of Arabia, learning many languages, playing music, and other human things because he wants to act like a human.