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 Are They Doing in Heaven? What Are They Doing in Heaven? "What Are They Doing in Heaven?" is a Christian hymn written in 1901 by American Methodist minister Charles Albert Tindley. , it has become popular enough to have been included in 16 hymnals. The song has sometimes been recorded under the titles "What Are They Doing?" and "What Are They Doing in Heaven Today?". The question mark is often omitted. The song may also be known by its first line, "I am thinking of friends whom I used to know". The song consists of four verses and a refrain, each four lines long. In