Goof visualization and fun way to look at what we often take for granted. It is good to continuously remind ourselves what some of these numbers are and to continue to be amazed at the world we live in.
Given the exponential rate of change, ideally this needs to be a fed with live data such that the numbers can show both the value at any one time as well as the rate of change.
And best of all perhaps, there is lots more where this came from, the OnlineEducation site and the OlineEducation blog. Well worth your time but be forewarned that you likely won't be able to look at just one of their great graphics. And that's the good news!