Geologic Calendar is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
The original reference link was dead, and some of the numbers and dates used based on that reference link were wrong. Using two new references, I fixed the dates and removed the dead link. Additionally, I cleaned up the writing a little bit. On the 82.2 seconds of human history figure, I used the conversion rate from the KGS of 146 calendar seconds per year for about 12,000 years (comes out to 12001.2). I hope that doesn't count as "original research", as I wanted maintain some of the previous editor's writing on that.