500 wildlife refugees. some i write about in the book, west virginia, south carolina, this is big, wild country still. we saved this due to people like walt disney, william o'douglas and others. >> so doug, it's gorgeous, it's irreplaceable, you've got to go there. is there any warning this this book that tells us, wait a second, something is going on where we might lose part of this or something is under threat? >> the glaciers are melting. global warming is very real. if you could ask lisa murkowski whose probe for drilling in the arctic refuge. i begin this book with mir going at the outside passage. he's one of the great american writers. the glaciers he wrote about and documented in great detail. many of the species of alaska,