Conservation and restoration of fur objects made from keratin, which is also the protein that makes up skin, feathers, nails, hooves, claws, and horns. "The way I think a lot of people understand fur versus hair is in the density of follicles," says Ross McPhee, Curator of the Department of Mammalogy at the American Museum of Natural History. "So for fur-bearing animals—which were converted into coats and so-forth—people always wanted it to be something that was very dense, so there’s the idea therefore that fur is dense, and it certainly is in [the] kinds of fur-bearers that we use for this purpose. Whereas hair is not
Hair (Lady Gaga song) about having a good time." Matthew Perpetua from "Rolling Stone" called it a mixture of yearning romantic melodrama of "We Belong" with the hard industrial metal edge of Broken-era Nine Inch Nails. Greg Kot of the "Chicago Tribune" felt that Gaga's vocals are Auto-Tuned throughout the song. The lyrics of "Hair" talk about embracing one's hairstyle as the ultimate expression of their identity, hence it ends with Gaga triumphantly declaring "I am my hair!" at the end of the final chorus. "Hair" has received mostly positive reviews. An hour before starting the final leg of The Monster Ball Tour, Gaga