Interesting. It's not clear to me why the sediment that eventually fills an abandoned burrow would have a different consistency from the surrounding dirt and thus fossilize differently.
I believe (but don't have a link to confirm) that one way these super-long beards, braids, etc are achieved is not that the hair follicle continues to provide new growth, but that the hairs are interwoven or become matted with body oils and after one hair dies it just stays in the braid/beard supported by the others. Anybody know?
http://articles.chicagotribune.com/2002-05-06/features/0205060195_1_pet-names-popular-dog-dogs-share
I thought the Flag Code prohibits wearing the flag.