Sir David Attenborough, the great English natural history filmmaker, is perhaps best known for his Life collection, a series of nine nature documentaries aired on the BBC between 1979 and 2008. To promote the broadcast of his latest production, Frozen Planet, ad agency RKCR/Y&R produced a video with Attenborough reading lines from Louis Armstrong's classic, "What a Wonderful World." It's a perfect way to get into the holiday spirit.