Timeline 2
Timeline 3: Map
Timeline 4
Timeline 5: Event Granulation
Expressing events on a Universal timeline is challenging, because not all events are expressed the same way. So many locations and events are known within probable ranges, and/or ranges within ranges. While an historical figure's birth for instance, always takes place in one sense, within a range of a few square feet, available information may be uncertain as to the valley, city, or region that the birth took place in. Yet a user would want to know these possibilities by looking at the map and timeline.
Something like the the spread of the iron age did not take place in any specific location, but took place in people's minds and in various cities and regions over a general span of time.
Events are also expressed differently as to their specificity. The Earth is 4.3 billion years old but certainly not to the accuracy of hundreds of thousands of years. At the same time, expressing most historical events in a range of 100,000 years is useless.
So there need to be ways of expressing these variances in a seemless and intuitive way graphically, such that users can notice how tentatively or specifically something is known, just by looking at the timeline. (It might not be impossible)
