Progeria, also known as Hutchinson-Gilford progeria syndrome (HGPS), is a rare genetic condition that causes a child's body to age fast.Most kids with progeria do not live past the age of 13. The disease affects both sexes and all races equally.rogeria, also known as Hutchinson-Gilford progeria syndrome (HGPS), is a rare genetic condition that causes a child's body to age fast.
Pentatonix is made up of Avi Kaplan, a most distinctive bass; Kevin Olusola, the vocal percussionist or the beatboxer; Kirstie Maldonado, the mezzo soprano and only girl in the line-up; Mitch Grassi who does both tenor and counter-tenor voices; and Scott Hoying, the baritone who sings lead most of the time.
Percussion instruments are classified as tuned or untuned. Tuned instruments play specific pitches or notes, just like the woodwind, brass and string instruments. Untuned instruments produce a sound with an indefinite pitch, like the sound of a hand knocking on a door.himes are a tuned instrument consisting of a set of 12 to 18 metal tubes hung from a metal frame. The chimes, or tubular bells, sound like a church bell when they are struck with a mallet.