Have you ever wondered what the AOSP source tree would look like if someone stitched together a video of every commit, update, and release? Ponder no more, friends, because YouTube user xcco3x has made that a reality. A visually amazing 21 minute reality, to be exact.
A little background info, per the description on YouTube:
The graph represents the source tree. Non-leaf nodes are directories and leaf nodes are files where their color represents the type of file. Files appear as they are modified and disappear if they are not touched for 2.5 seconds.
In other words, each "blast" from a user is a commit. These commits come from both Googlers and contributors. The data was taken from stitching together the logs of all the many AOSP projects. It does not include the external/* and prebuilt/* projects which are dependencies of Android.
The imagery was generating using open source software called gource. It basically just places the root directory of a project at the center, displaying each subsequent directory as a branch and each file as a leaf.
Absolutely incredible. Enjoy.