Took these two screenshots recently, thought you all might enjoy them. Shows our evolving understanding of the complexity of the human genome at the population-scale, as reflected in the changes in the reference genome between hg19 and hg38.
(ignore the temp folder, not part of hg19)
Note: I make no claims as to actual accuracy or completeness of these two directory listings, I haven't taken a close look at them in a while. But they're interesting from a big-picture perspective.
hg19 / GRCh37: 2009
hg38 / GRCh38: 2013