Craniate with well-defined heads, thus excluding members of the chordate subphyla Tunicata (tunicates) and Cephalochordata (lancelets), but including Myxini, which have cartilaginous skulls and tooth-like structures composed of keratin. Craniata also includes all lampreys and armoured jawless fishes, armoured fish, sharks, skates, and rays, and teleostomians: spiny sharks, bony fish, lissamphibians, temnospondyls and protoreptiles, sauropsids and mammals. The craniate head consists of a brain, sense organs, including eyes, and a skull. In addition to distinct crania (sing. "cranium"), craniates possess many derived characteristics, which have allowed for more complexity to follow. Molecular-genetic analysis of craniates reveals that, compared to less complex
What Might Have Been In this song, the narrator tells himself or his former romantic interest that he cannot change the past and that there is no way to know what their relationship could have become. The exact circumstances are left open-ended. Two music videos of the song, directed by Jack Cole, were filmed for the song. The first version, filmed entirely in sepia tone, focuses around World War II and shows a couple dancing just before the man has to go off to war. Old stock footage from the war is shown also. The second version features a man named Michael, who brings