Let me introduce myself. my name is Adalberto. I am the principal of an Italian high school, I just retired and I am interested in Big History.
I saw your Timeline Projects. They are very interesting but, in my
opinion, they have the same problem: the proportional representation of human history in the history of the universe.
These days, I am in New York and I visited the Natural History Museum. Walking down along the beautiful spiral representing the history of the universe, in which mankind's history takes a few centimeters, I was watching the people with me: nobody gets passionate about a story in which he has a minimal part.
There are many reasons to adopt a logarithmic scale on a universal history timeline as suggested in 1995 by Heinz Von Foster. For instance your projects could have a stable basis (anthropocentric) as a starting point. In fact I had some cognitive difficulties zooming in and out of the immensity of the universe...and in any case we have more infomation on mankind's history.
This could be a logarithmic scale of the timeline of the universe:
http://www.codetta.it/mappe/universal_timeline.pdf
In my opinion all the events of the history of the universe could be better inserted and interpreted having such a costant reference with the history of mankind.
Adalberto Codetta