Feather development non-nervous. They have a tubular central shaft called the rachis; coming off either side of the rachis are the veins, which have a series of barbs with interlocking connections that are called barbules. The rachis and attached veins make up the spathe. The opposite of the rachis is the calamus, which anchors the feather to the body and is moved by attached dermal muscles. There are many different types of feathers that mostly follow this basic design with few variations based on evolutionary needs. Feathers are sometimes referred to as “elaborate reptile scales” just as birds are sometimes viewed as
What a Terrible World, What a Beautiful World of "Make You Better", stating "The band has never lacked the musical bona fides to write a great anthem." The album debuted at No. 7 on the "Billboard" 200 albums chart on its release, selling around 50,000 copies in the United States in its first week. It also debuted at No. 2 on "Billboard"'s Top Rock Albums, and No. 1 on the Folk Albums chart. The album has sold 123,000 copies in the United States as of October 2015. All songs written by Colin Meloy. According to the liner notes of "What a Terrible World, What a Beautiful World". What