This improv game is in the following improv game categories:
A scene is played, number of players unlimited. The scene starts in prehistoric
times, and evolves through the ages, till it ends in the future.
The idea is to stick to one and the same story line, but as time progresses,
characters may take on characteristics or use attributes appropriate to the
`time`. Of course, every characteristic and attribute needs to be justified
and take the scene forward.