Like others, I liked the loop-back to today. I think it would be nice to include decade before century. Also, more or less at/after "period" I started to get a

Like others, I liked the loop-back to today. I think it would be nice to include decade before century. Also, more or less at/after "period" I started to get a little bored (see the discussion in these comments about losing perspective) UNTIL you added the second dimension about life itself and then it got interesting again because we think of dinosaurs and such to be so, so, so long ago and yet this animation shows that in the grand scheme of things, it's as if it had been last week.